Flavivirus Infections, Healthy Participants, Virus, Zika, Zika Virus Disease
Conditions
Keywords
Drug therapy
Brief summary
The purpose of this study is to describe the safety, tolerability and immunogenicity of two doses of purified inactivated Zika virus vaccine (PIZV) given 28 days apart. Three different vaccine doses containing different protein concentrations (2, 5 or 10 microgram \[mcg\]) each, will be given as 2 dose schedule to flavivirus naive and primed healthy adults. Participants will be followed for 7 days post each dose for tolerability and up to 6 months post dose 2 for safety. Immunogenicity assessment will be performed at 28 days post each dose and 6 months post dose 2. In addition, the selected dose group and control group will be followed till 24 months post dose 2 for safety and persistence of immunity.
Detailed description
The vaccine being tested in this study is called PIZV or TAK-426 adjuvanted with aluminum hydroxide. The Zika virus vaccine is being tested to provide safety and immunogenicity data to enable the vaccine to be further developed clinically. The study will enroll approximately 240 participants. Participants will be randomly assigned (by chance, like flipping a coin) to one of the four groups-which will remain undisclosed to the study observer: * Placebo * PIZV: 2 microgram (mcg) Low Dose * PIZV: 5 mcg Medium Dose * PIZV: 10 mcg High Dose All participants will be administered either placebo or PIZV by intramuscular (IM) injection into the middle third of the deltoid muscle, preferably in the non-dominant arm on Days 1 (Visit 1) and 29 (Visit 4). This multi-center trial will be conducted in the United States and Puerto Rico. The overall time to participate in this study is up to 25 months. Participants will make multiple visits to the clinic on Days 1, 8, 29, 36, 57, 211, 393 and will be contacted by telephone on Day 133 (Visit 7) and Day 575 (Visit 9) and also visit the clinic on Day 757 (Visit 11) depending on the study arm, for a final follow-up assessment.
Interventions
DRUGPlacebo
Placebo (normal saline (0.9% NaCl) IM injection.
BIOLOGICALPIZV
Purified inactivated Zika virus vaccine with aluminum hydroxide adjuvant IM injection.
Sponsors
Takeda
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 49 Years
Healthy volunteers
Yes
Inclusion criteria
1. Participants who are in good health at the time of entry into the trial as determined by medical history, physical examination (including vital signs) and eligibility screening tests (hematology, biochemistry and urinalysis) and clinical judgment of the investigator. Vital signs must be within normal limits (ie, below Grade 1 as specified in the Food and Drug Administration \[FDA\] Toxicity Grading Scale for Healthy Adult and Adolescent Volunteers). Screening tests must be within normal limits or not be above Grade 1 as defined in the FDA Toxicity Grading Scale for Healthy Adult and Adolescent Volunteers. 2. Participants who can comply with trial procedures and are available for the duration of follow-up. 3. All female participants must be willing to undergo serum beta human chorionic gonadotropin (B-hCG) pregnancy test and must test negative by urine pregnancy test prior to each study vaccination.
Exclusion criteria
1. Participants and participants' partners with confirmed Zika virus (ZIKV) infection by self-report. 2. Traveling to flavivirus endemic countries or flavivirus endemic regions of the United States (US) or US territories\*, within 4 weeks prior to screening or planned travel through to Visit 6 (applicable only to participants to be enrolled into the flavivirus naïve cohort). a. Centers for Disease Control and Prevention (CDC) website define the information about the flavivirus endemic countries and US regions and territories. 3. Known hypersensitivity or allergy to any of the vaccine candidate components (including excipients of the investigational vaccine or placebo). 4. Has any history of progressive or severe neurologic disorder, seizure disorder or neuro-inflammatory disease (example, Guillain-Barré syndrome). 5. Known or suspected impairment/alteration of immune function, including: * Chronic use of oral steroids (equivalent to 20 milligram per day \[mg/day\] prednisone greater than or equal to \[\>=\] 12 weeks / \>= 2 milligram per kilogram \[mg/kg\] body weight / day prednisone \>= 2 weeks) within 60 days prior to Day 1 (use of inhaled, intranasal, or topical corticosteroids is allowed). * Receipt of parenteral steroids (equivalent to 20 mg/day prednisone \>= 12 weeks / \>= 2 mg/kg body weight / day prednisone \>= 2 weeks) within 60 days prior to Day 1. * Receipt of immunostimulants within 60 days prior to Day 1. * Receipt of parenteral, epidural or intra-articular immunoglobulin preparation, blood products, and/or plasma derived products within 3 months prior to Day 1 or planned during the full length of the trial. In addition, participants must be advised not to donate blood during the study period. * Known Human Immunodeficiency Virus (HIV) infection or HIV-related disease. * Genetic immunodeficiency. 6. Has known current or chronic hepatitis B and/or hepatitis C infections. 7. Has abnormalities of spleen or thymic function. 8. Has a known bleeding diathesis, or any condition that may be associated with a prolonged bleeding time. 9. Individuals participating in any clinical trial with another investigational product, including ZIKV vaccine clinical trial within 30 days prior to first trial visit or intent to participate in another clinical trial at any time during the conduct of this trial. 10. Individuals who received any other vaccines within 14 days (for inactivated vaccines) or 28 days (for live vaccines) prior to enrollment in this trial or who are planning to receive any vaccine within 28 days of investigational vaccine/placebo administration. 11. Female participants who are pregnant or breastfeeding, or are planning to become pregnant. 12. Any positive or indeterminate pregnancy test. 13. If female participant of childbearing potential, sexually active, and who has not used any of the acceptable contraceptive methods for at least 2 months prior to trial entry: * Of childbearing potential is defined as status post onset of menarche and not meeting any of the following conditions: menopausal for at least 2 years without any other alternative medical cause (as confirmed by a healthcare professional), status after bilateral tubal ligation for at least 1 year, status after bilateral oophorectomy, or status after hysterectomy. * Acceptable birth control methods are defined as one or more of the following: * Hormonal contraceptive (such as oral, injection, transdermal patch, implant, cervical ring). * Barrier (condom with spermicide or diaphragm with spermicide) each and every time during intercourse. * Intrauterine device. * Monogamous relationship with vasectomized partner. Partner must have been vasectomized for at least six months prior to the participants' trial entry. 14. If female participant of childbearing potential and sexually active, refusal to use an acceptable contraceptive method from trial entry through 2 months after the last dose of investigational vaccine/placebo. In addition female participants of childbearing potential must be advised not to donate ova during this period. 15. To avoid sexual transmission of ZIKV from natural exposure: Refusal to use latex condoms correctly and consistently by sexually active participants even if other contraceptive measures are used from signing the informed consent form (ICF) through the end of the trial. Male participants must be advised not to donate sperm during this period.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 28 days after Dose 2 (Day 57) | GMTs of neutralizing antibodies for ZIKV were measured by the Zika plaque reduction neutralization test (PRNT) test, by assessing the quantity of neutralizing antibodies that bind ZIKV in the assay. The assay results were reported as titers (reciprocal value of the dilution of the serum from the vaccinated individual that inhibits for 50% the plaque formation). |
| Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Within 7 days after Dose 1 (Day 8) | Solicited systemic AEs included fever, headache, fatigue, malaise, arthralgia, and myalgia that occurred within 7 days of first vaccination. Solicited systemic AEs (headache, fatigue, malaise, arthralgia, and myalgia) was graded from 0 to 3 by severity; where 0=None, 1=Mild: No interference with daily activity, 2=Moderate: Interference with daily activity, 3=Severe: Prevents daily activity; A systemic AE of fever (defined as ≥38°C or ≥100.4°F) was graded from 1 to 4 by severity; where 1=Mild: 38.0-38.4°C, 2=Moderate: 38.5-38.9°C, 3=Severe: 39.0-40°C, and 4=Potentially life threatening:\>40°C. Only categories for which there was at least 1 participant are reported. |
| Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Within 7 days after Dose 2 (Day 36) | Solicited systemic AEs included fever, headache, fatigue, malaise, arthralgia, and myalgia that occurred within 7 days of first vaccination. Solicited systemic AEs (headache, fatigue, malaise, arthralgia, and myalgia) was graded from 0 to 3 by severity; where 0=None, 1=Mild: No interference with daily activity, 2=Moderate: Interference with daily activity, 3=Severe: Prevents daily activity; A systemic AE of fever (defined as ≥38°C or ≥100.4°F) was graded from 1 to 4 by severity; where 1=Mild: 38.0-38.4°C, 2=Moderate: 38.5-38.9°C, 3=Severe: 39.0-40°C, and 4=Potentially life threatening:\>40°C. Only categories for which there was at least 1 participant are reported. |
| Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | Within 28 days after Dose 1 (Day 29) | An AE was defined as any untoward medical occurrence in participants administered a trial vaccine; it does not necessarily have to have a causal relationship with trial vaccine administration. |
| Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | Within 28 days after Dose 2 (Day 57) | An AE was defined as any untoward medical occurrence in a clinical investigation participants administered a trial vaccine; it does not necessarily have to have a causal relationship with trial vaccine administration. |
| Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | Within 28 days after Dose 1 (Day 29) | A SAE was defined as any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is an medically important event that satisfies any of the following: a) May require intervention to prevent items 1 through 5 above. b) May expose the participant to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization. |
| Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | Within 28 days after Dose 2 (Day 57) | A SAE was defined as any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is an medically important event that satisfies any of the following: a) May require intervention to prevent items 1 through 5 above. b) May expose the participant to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization. |
| Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Within 7 days after Dose 1 (Day 8) | Solicited local AEs (at injection site) were collected by participants using diary cards within 7 days after first vaccination and included pain (none, mild: no interference with daily activity, moderate: interference with daily activity with or without treatment and severe: prevents daily activity with or without treatment), erythema (\<25 mm, mild: \>=25 to- \<=50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm), and swelling and induration (\<25 mm, mild: \>=25 to \<=-50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm). Only categories for which there was at least 1 participant are reported. |
| Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Within 7 days after Dose 2 (Day 36) | Solicited local AEs (at injection site) were collected by participants using diary cards within 7 days after first vaccination and included pain (none, mild: no interference with daily activity, moderate: interference with daily activity with or without treatment and severe: prevents daily activity with or without treatment), erythema (\<25 mm, mild: \>=25 to \<=50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm), and swelling and induration (\<25 mm, mild: \>=25 to \<=50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm). Only categories for which there was at least 1 participant are reported. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | 28 days after Dose 1 (Day 29); 6 months after Dose 2 (Day 211) | GMTs of neutralizing antibodies for ZIKV were measured by Zika PRNT test, by assessing the quantity of neutralizing antibodies that bind ZIKV in the assay. The assay results were reported as titers (reciprocal value of the dilution of the serum from the vaccinated individual that inhibits for 50% the plaque formation). |
| GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | 12 months after Dose 2 (Day 393); 24 months after Dose 2 (Day 757) | GMTs of neutralizing antibodies for ZIKV were measured by Zika PRNT test, by assessing the quantity of neutralizing antibodies that bind ZIKV in the assay. The assay results were reported as titers (reciprocal value of the dilution of the serum from the vaccinated individual that inhibits for 50% the plaque formation). As prespecified in the protocol, only data for applicable groups (Placebo and PIZV 10 mcg who were followed beyond Day 211) were analyzed and reported at Days 393 and 757 for Flavivirus-naïve Cohort and Flavivirus-primed Cohort. |
| Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | 28 days after Dose 1 (Day 29); 28 days after Dose 2 (Day 57); 6 months after Dose 2 (Day 211) | Seropositive participants were defined as participants with detectable serum antibodies (tested positive at or above limit of detection, LOD) as measured by the neutralization assay. |
| Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | 12 months after Dose 2 (Day 393); 24 months after Dose 2 (Day 757) | Seropositive participants were defined as participants with detectable serum antibodies (tested positive at or above limit of detection, LOD) as measured by the neutralization assay. As prespecified in the protocol, only data for applicable groups (Placebo and PIZV 10 mcg who were followed beyond Day 211) were analyzed and reported at Days 393 and 757 for Flavivirus-naïve Cohort and Flavivirus-primed Cohort. |
| Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | 28 days after Dose 1 (Day 29); 28 days after Dose 2 (Day 57) | Seroconverted participants were defined as participants at Baseline with detectable post-vaccination serum antibodies (test results are at or above LOD) and seropositive participants at Baseline with a four-fold increase in post-vaccination antibodies from Baseline, as measured by the neutralization assay. |
| Percentage of Participants Who Experienced at Least One SAE During the Study | From day of first vaccination (Day 1) up to end of the study (Day 757) | A SAE was defined as any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is an medically important event that satisfies any of the following: a) May require intervention to prevent items 1 through 5 above. b) May expose the participant to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization. |
Countries
Puerto Rico, United States
Participant flow
Recruitment details
Study participants, aged \>=18 to \<=49 years, were enrolled in this Phase 1 study in 9 sites in the United States and Puerto Rico from 13 November 2017 to 24 November 2020.
Pre-assignment details
Flavivirus (FV) status was determined using a Luminex assay targeting 13 FV. FV-naïve participants with median fluorescent intensity (MFI) below that assigned for negative cut-off were first enrolled in FV-naïve Cohort in ratio 1:1:1:1 to receive either placebo or purified inactivated Zika virus vaccine (PIZV). After positive recommendation from data monitoring committee, FV-primed participants, with MFI\>500 were enrolled in FV-primed Cohort in ratio 1:1:1:1 to receive either placebo or PIZV.
Participants by arm
| Arm | Count |
|---|---|
| Flavivirus-naïve Cohort: Placebo Placebo injection, intramuscular (IM), once on Day 1 (first dose) and Day 29 (second dose). | 31 |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) PIZV 0.5 mL, 2 mcg antigen, IM injection, once on Day 1 (first dose) and Day 29 (second dose). | 31 |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) PIZV 0.5 mL, 5 mcg antigen, IM injection, once on Day 1 (first dose) and Day 29 (second dose). | 31 |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) PIZV 0.5 mL, 10 mcg antigen, IM injection, once on Day 1 (first dose) and Day 29 (second dose). | 32 |
| Flavivirus-primed Cohort: Placebo Placebo injection, IM, once on Day 1 (first dose) and Day 29 (second dose). | 36 |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) PIZV 0.5 mL, 2 mcg antigen, IM injection, once on Day 1 (first dose) and Day 29 (second dose). | 37 |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) PIZV 0.5 mL, 5 mcg antigen, IM injection, once on Day 1 (first dose) and Day 29 (second dose). | 37 |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) PIZV 0.5 mL, 10 mcg antigen, IM injection, once on Day 1 (first dose) and Day 29 (second dose). | 36 |
| Total | 271 |
Withdrawals & dropouts
| Period | Reason | FG000 | FG001 | FG002 | FG003 | FG004 | FG005 | FG006 | FG007 |
|---|---|---|---|---|---|---|---|---|---|
| Overall Study | Data Entry Error | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Overall Study | Lost to Follow-up | 4 | 3 | 2 | 5 | 4 | 4 | 4 | 7 |
| Overall Study | Reason not Specified | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| Overall Study | Withdrawal of Consent | 2 | 1 | 0 | 3 | 3 | 1 | 1 | 2 |
Baseline characteristics
| Characteristic | Flavivirus-naïve Cohort: Placebo | Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Flavivirus-primed Cohort: Placebo | Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Total |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | 36.7 years STANDARD_DEVIATION 8.93 | 34.9 years STANDARD_DEVIATION 9.52 | 35.8 years STANDARD_DEVIATION 8.86 | 34.1 years STANDARD_DEVIATION 8.5 | 34.7 years STANDARD_DEVIATION 8.2 | 35.5 years STANDARD_DEVIATION 8.71 | 37.0 years STANDARD_DEVIATION 8.89 | 35.4 years STANDARD_DEVIATION 8.45 | 35.5 years STANDARD_DEVIATION 8.69 |
| Body Mass Index (BMI) | 27.921 kg/m^2 STANDARD_DEVIATION 4.2049 | 27.527 kg/m^2 STANDARD_DEVIATION 4.7632 | 27.541 kg/m^2 STANDARD_DEVIATION 3.7165 | 26.750 kg/m^2 STANDARD_DEVIATION 3.6511 | 27.398 kg/m^2 STANDARD_DEVIATION 3.5244 | 27.054 kg/m^2 STANDARD_DEVIATION 4.7105 | 26.982 kg/m^2 STANDARD_DEVIATION 4.124 | 28.072 kg/m^2 STANDARD_DEVIATION 4.4735 | 27.398 kg/m^2 STANDARD_DEVIATION 4.1433 |
| Ethnicity (NIH/OMB) Hispanic or Latino | 1 Participants | 1 Participants | 2 Participants | 4 Participants | 36 Participants | 36 Participants | 36 Participants | 35 Participants | 151 Participants |
| Ethnicity (NIH/OMB) Not Hispanic or Latino | 30 Participants | 30 Participants | 29 Participants | 28 Participants | 0 Participants | 1 Participants | 0 Participants | 1 Participants | 119 Participants |
| Ethnicity (NIH/OMB) Unknown or Not Reported | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 1 Participants | 0 Participants | 1 Participants |
| Race (NIH/OMB) American Indian or Alaska Native | 2 Participants | 0 Participants | 0 Participants | 0 Participants | 1 Participants | 0 Participants | 0 Participants | 0 Participants | 3 Participants |
| Race (NIH/OMB) Asian | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) Black or African American | 6 Participants | 5 Participants | 3 Participants | 4 Participants | 6 Participants | 4 Participants | 7 Participants | 10 Participants | 45 Participants |
| Race (NIH/OMB) More than one race | 0 Participants | 0 Participants | 2 Participants | 1 Participants | 1 Participants | 1 Participants | 0 Participants | 1 Participants | 6 Participants |
| Race (NIH/OMB) Native Hawaiian or Other Pacific Islander | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 1 Participants | 1 Participants | 0 Participants | 0 Participants | 2 Participants |
| Race (NIH/OMB) Unknown or Not Reported | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) White | 23 Participants | 26 Participants | 26 Participants | 27 Participants | 27 Participants | 31 Participants | 30 Participants | 25 Participants | 215 Participants |
| Region of Enrollment Puerto Rico | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 15 Participants | 16 Participants | 16 Participants | 15 Participants | 62 Participants |
| Region of Enrollment United States of America | 31 Participants | 31 Participants | 31 Participants | 32 Participants | 21 Participants | 21 Participants | 21 Participants | 21 Participants | 209 Participants |
| Sex: Female, Male Female | 21 Participants | 16 Participants | 18 Participants | 14 Participants | 21 Participants | 18 Participants | 26 Participants | 24 Participants | 158 Participants |
| Sex: Female, Male Male | 10 Participants | 15 Participants | 13 Participants | 18 Participants | 15 Participants | 19 Participants | 11 Participants | 12 Participants | 113 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk | EG003 affected / at risk | EG004 affected / at risk | EG005 affected / at risk | EG006 affected / at risk | EG007 affected / at risk |
|---|---|---|---|---|---|---|---|---|
| deaths Total, all-cause mortality | 0 / 31 | 0 / 31 | 0 / 31 | 0 / 32 | 0 / 36 | 0 / 37 | 0 / 37 | 0 / 36 |
| other Total, other adverse events | 4 / 31 | 3 / 31 | 3 / 31 | 4 / 32 | 5 / 36 | 5 / 37 | 7 / 37 | 8 / 36 |
| serious Total, serious adverse events | 1 / 31 | 1 / 31 | 0 / 31 | 2 / 32 | 1 / 36 | 2 / 37 | 0 / 37 | 4 / 36 |
Outcome results
Primary
Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo
GMTs of neutralizing antibodies for ZIKV were measured by the Zika plaque reduction neutralization test (PRNT) test, by assessing the quantity of neutralizing antibodies that bind ZIKV in the assay. The assay results were reported as titers (reciprocal value of the dilution of the serum from the vaccinated individual that inhibits for 50% the plaque formation).
Time frame: 28 days after Dose 2 (Day 57)
Population: Per-Protocol Set (PPS) included participants in the Full Analysis Set (FAS) who have no major protocol violations (relevant for the analysis, primary immunogenicity assessment or persistence assessment). Overall number of participants analyzed are the number of participants with data available for analyses.
| Arm | Measure | Value (GEOMETRIC_MEAN) |
|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 5.00 titer |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 1129.69 titer |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 1992.33 titer |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 3689.89 titer |
| Flavivirus-primed Cohort: Placebo | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 198.82 titer |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 597.63 titer |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 1276.92 titer |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Geometric Mean Titers (GMTs) of Neutralizing Antibody for Zika Virus (ZIKV) 28 Days After Dose 2 of PIZV or Placebo | 2590.54 titer |
Primary
Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo
An AE was defined as any untoward medical occurrence in participants administered a trial vaccine; it does not necessarily have to have a causal relationship with trial vaccine administration.
Time frame: Within 28 days after Dose 1 (Day 29)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 29.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 19.4 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 29.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 9.4 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 22.2 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 21.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 21.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 1 of PIZV or Placebo | 16.7 percentage of participants |
Primary
Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo
An AE was defined as any untoward medical occurrence in a clinical investigation participants administered a trial vaccine; it does not necessarily have to have a causal relationship with trial vaccine administration.
Time frame: Within 28 days after Dose 2 (Day 57)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 16.1 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 16.1 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 9.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 12.5 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 8.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 13.5 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 13.5 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One Non-serious Unsolicited AE Within 28 Days After Dose 2 of PIZV or Placebo | 13.9 percentage of participants |
Primary
Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo
A SAE was defined as any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is an medically important event that satisfies any of the following: a) May require intervention to prevent items 1 through 5 above. b) May expose the participant to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization.
Time frame: Within 28 days after Dose 2 (Day 57)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One SAE Within 28 Days After Dose 2 of PIZV or Placebo | 0.0 percentage of participants |
Primary
Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo
A SAE was defined as any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is an medically important event that satisfies any of the following: a) May require intervention to prevent items 1 through 5 above. b) May expose the participant to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization.
Time frame: Within 28 days after Dose 1 (Day 29)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 2.7 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One Serious Adverse Event (SAE) Within 28 Days After Dose 1 of PIZV or Placebo | 0.0 percentage of participants |
Primary
Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo
Solicited local AEs (at injection site) were collected by participants using diary cards within 7 days after first vaccination and included pain (none, mild: no interference with daily activity, moderate: interference with daily activity with or without treatment and severe: prevents daily activity with or without treatment), erythema (\<25 mm, mild: \>=25 to- \<=50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm), and swelling and induration (\<25 mm, mild: \>=25 to \<=-50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm). Only categories for which there was at least 1 participant are reported.
Time frame: Within 7 days after Dose 1 (Day 8)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo. Overall number of participants are the number of participants with data available for analyses.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 13.3 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 30.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 9.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 32.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 6.5 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 38.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 8.3 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 5.6 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 9.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 33.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 6.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 2.8 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 5.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 30.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 5.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 8.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Erythema, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Swelling, <25 mm | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Mild | 34.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Pain, Moderate | 2.9 percentage of participants |
Primary
Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo
Solicited local AEs (at injection site) were collected by participants using diary cards within 7 days after first vaccination and included pain (none, mild: no interference with daily activity, moderate: interference with daily activity with or without treatment and severe: prevents daily activity with or without treatment), erythema (\<25 mm, mild: \>=25 to \<=50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm), and swelling and induration (\<25 mm, mild: \>=25 to \<=50 mm, moderate: \>50 to \<=100 mm, severe: \>100 mm). Only categories for which there was at least 1 participant are reported.
Time frame: Within 7 days after Dose 2 (Day 36)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo. Overall number of participants are the number of participants with data available for analyses.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 3.6 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 14.3 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 29.6 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 30.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 36.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 18.2 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 3.2 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 21.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 6.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 21.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Swelling, <25 mm | 5.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Mild | 20.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Erythema, <25 mm | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Induration, <25 mm | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Local Injection Site Reactions by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Pain, Moderate | 8.8 percentage of participants |
Primary
Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo
Solicited systemic AEs included fever, headache, fatigue, malaise, arthralgia, and myalgia that occurred within 7 days of first vaccination. Solicited systemic AEs (headache, fatigue, malaise, arthralgia, and myalgia) was graded from 0 to 3 by severity; where 0=None, 1=Mild: No interference with daily activity, 2=Moderate: Interference with daily activity, 3=Severe: Prevents daily activity; A systemic AE of fever (defined as ≥38°C or ≥100.4°F) was graded from 1 to 4 by severity; where 1=Mild: 38.0-38.4°C, 2=Moderate: 38.5-38.9°C, 3=Severe: 39.0-40°C, and 4=Potentially life threatening:\>40°C. Only categories for which there was at least 1 participant are reported.
Time frame: Within 7 days after Dose 1 (Day 8)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo. Number analyzed is the number of participants with data available for analyses in the specific category.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 20.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 13.3 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 16.7 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 16.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 13.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 16.1 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 19.4 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 16.1 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 6.5 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 12.9 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 25.8 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 6.5 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 6.5 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 12.9 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 12.9 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 8.3 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 11.1 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 8.3 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 2.8 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 19.4 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 19.4 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 2.8 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 16.7 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 12.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 2.7 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 6.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 12.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 12.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 12.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 2.8 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 11.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 2.8 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 5.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 13.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 13.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 16.7 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 25.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Mild | 5.7 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Mild | 8.6 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Moderate | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Severe | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Mild | 22.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Mild | 17.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fatigue, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Fever, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Severe | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic Adverse Events (AEs) by Severity Within 7 Days After Dose 1 of PIZV or Placebo | Headache, Mild | 11.4 percentage of participants |
Primary
Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo
Solicited systemic AEs included fever, headache, fatigue, malaise, arthralgia, and myalgia that occurred within 7 days of first vaccination. Solicited systemic AEs (headache, fatigue, malaise, arthralgia, and myalgia) was graded from 0 to 3 by severity; where 0=None, 1=Mild: No interference with daily activity, 2=Moderate: Interference with daily activity, 3=Severe: Prevents daily activity; A systemic AE of fever (defined as ≥38°C or ≥100.4°F) was graded from 1 to 4 by severity; where 1=Mild: 38.0-38.4°C, 2=Moderate: 38.5-38.9°C, 3=Severe: 39.0-40°C, and 4=Potentially life threatening:\>40°C. Only categories for which there was at least 1 participant are reported.
Time frame: Within 7 days after Dose 2 (Day 36)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo. Number analyzed is the number of participants with data available for analyses in the specific category.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 6.9 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 3.4 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 3.4 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 3.4 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 6.9 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 13.8 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 3.4 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 6.9 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 7.4 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 14.8 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 11.1 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 7.4 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 16.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 6.7 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 13.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 3.3 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 3.3 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 9.1 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 6.1 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 12.1 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 9.1 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 3.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 6.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 9.4 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 12.5 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 9.4 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 12.5 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 6.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 3.1 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 6.4 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 6.3 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Severe | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Moderate | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fatigue, Mild | 11.8 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Mild | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Moderate | 8.8 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Moderate | 5.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Myalgia, Moderate | 5.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Fever, Mild | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Severe | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Headache, Mild | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Malaise, Mild | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Mild | 2.9 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants With Solicited Systemic AEs by Severity Within 7 Days After Dose 2 of PIZV or Placebo | Arthralgia, Moderate | 2.9 percentage of participants |
Secondary
GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups
GMTs of neutralizing antibodies for ZIKV were measured by Zika PRNT test, by assessing the quantity of neutralizing antibodies that bind ZIKV in the assay. The assay results were reported as titers (reciprocal value of the dilution of the serum from the vaccinated individual that inhibits for 50% the plaque formation). As prespecified in the protocol, only data for applicable groups (Placebo and PIZV 10 mcg who were followed beyond Day 211) were analyzed and reported at Days 393 and 757 for Flavivirus-naïve Cohort and Flavivirus-primed Cohort.
Time frame: 12 months after Dose 2 (Day 393); 24 months after Dose 2 (Day 757)
Population: PPS included participants in the FAS who had no major protocol violations (relevant for the analysis, primary immunogenicity assessment or persistence assessment). Overall number of participants analyzed are the number of participants with data available for analyses. Number analyzed is the number of participants with data available for analysis at the given timepoint.
| Arm | Measure | Group | Value (GEOMETRIC_MEAN) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 5.00 titer |
| Flavivirus-naïve Cohort: Placebo | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 18.48 titer |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 427.41 titer |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 413.71 titer |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 103.88 titer |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 324.26 titer |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 505.10 titer |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | GMTs of Neutralizing Antibody for ZIKV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 149.68 titer |
Secondary
GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2
GMTs of neutralizing antibodies for ZIKV were measured by Zika PRNT test, by assessing the quantity of neutralizing antibodies that bind ZIKV in the assay. The assay results were reported as titers (reciprocal value of the dilution of the serum from the vaccinated individual that inhibits for 50% the plaque formation).
Time frame: 28 days after Dose 1 (Day 29); 6 months after Dose 2 (Day 211)
Population: PPS included participants in the FAS who have no major protocol violations (relevant for the analysis, primary immunogenicity assessment or persistence assessment). Number analyzed is the number of participants with data available for analysis at the given tlmepoint.
| Arm | Measure | Group | Value (GEOMETRIC_MEAN) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 5.00 titer |
| Flavivirus-naïve Cohort: Placebo | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 5.00 titer |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 41.28 titer |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 151.24 titer |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 93.76 titer |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 364.10 titer |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 291.41 titer |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 613.28 titer |
| Flavivirus-primed Cohort: Placebo | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 164.06 titer |
| Flavivirus-primed Cohort: Placebo | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 125.80 titer |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 513.62 titer |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 258.44 titer |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 506.97 titer |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 1002.69 titer |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 29 | 1572.58 titer |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | GMTs of Neutralizing Antibody for ZIKV 28 Days After Dose 1 and 6 Months After Dose 2 | Day 211 | 866.26 titer |
Secondary
Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2
Seroconverted participants were defined as participants at Baseline with detectable post-vaccination serum antibodies (test results are at or above LOD) and seropositive participants at Baseline with a four-fold increase in post-vaccination antibodies from Baseline, as measured by the neutralization assay.
Time frame: 28 days after Dose 1 (Day 29); 28 days after Dose 2 (Day 57)
Population: Per-Protocol Set (PPS) included participants in the Full Analysis Set (FAS) who have no major protocol violations (relevant for the analysis, primary immunogenicity assessment or persistence assessment). Number analyzed is the number of participants with data available for analysis at the given tlmepoint.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 72.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 82.14 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 96.43 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 2.94 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 6.45 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 38.71 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 46.67 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 54.84 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 50.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 29 | 69.70 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seroconverted for PIZV 28 Days Post Dose 1 and 28 Days Post Dose 2 | Day 57 | 76.67 percentage of participants |
Secondary
Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2
Seropositive participants were defined as participants with detectable serum antibodies (tested positive at or above limit of detection, LOD) as measured by the neutralization assay.
Time frame: 28 days after Dose 1 (Day 29); 28 days after Dose 2 (Day 57); 6 months after Dose 2 (Day 211)
Population: PPS included participants in the FAS who had no major protocol violations (relevant for the analysis, primary immunogenicity assessment or persistence assessment). Number analyzed is the number of participants with data available for analysis at the given timepoint.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 72.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 82.14 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 100.00 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 96.43 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 76.67 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 85.29 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 87.10 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 96.67 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 96.77 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 84.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 211 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 29 | 100.00 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for Neutralizing Antibodies Against PIZV 28 Days After Dose 1, 28 Days After Dose 2, and 6 Months After Dose 2 | Day 57 | 100.00 percentage of participants |
Secondary
Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups
Seropositive participants were defined as participants with detectable serum antibodies (tested positive at or above limit of detection, LOD) as measured by the neutralization assay. As prespecified in the protocol, only data for applicable groups (Placebo and PIZV 10 mcg who were followed beyond Day 211) were analyzed and reported at Days 393 and 757 for Flavivirus-naïve Cohort and Flavivirus-primed Cohort.
Time frame: 12 months after Dose 2 (Day 393); 24 months after Dose 2 (Day 757)
Population: PPS included participants in the FAS who had no major protocol violations (relevant for the analysis, primary immunogenicity assessment or persistence assessment). Overall number of participants analyzed are the number of participants with data available for analyses. Number analyzed is the number of participants with data available for analysis at the given timepoint.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 0.00 percentage of participants |
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 26.32 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 93.75 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 100.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 65.63 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 85.19 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 393 | 100.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Seropositive for PIZV 12 Months and 24 Months After Dose 2 in Applicable Groups | Day 757 | 76.19 percentage of participants |
Secondary
Percentage of Participants Who Experienced at Least One SAE During the Study
A SAE was defined as any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is an medically important event that satisfies any of the following: a) May require intervention to prevent items 1 through 5 above. b) May expose the participant to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization.
Time frame: From day of first vaccination (Day 1) up to end of the study (Day 757)
Population: Safety Analysis Set included all randomized participants who received at least one (1) dose of PIZV or placebo.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Flavivirus-naïve Cohort: Placebo | Percentage of Participants Who Experienced at Least One SAE During the Study | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One SAE During the Study | 3.2 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One SAE During the Study | 0.0 percentage of participants |
| Flavivirus-naïve Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One SAE During the Study | 6.3 percentage of participants |
| Flavivirus-primed Cohort: Placebo | Percentage of Participants Who Experienced at Least One SAE During the Study | 2.8 percentage of participants |
| Flavivirus-primed Cohort: PIZV 2 mcg (Low Dose) | Percentage of Participants Who Experienced at Least One SAE During the Study | 5.4 percentage of participants |
| Flavivirus-primed Cohort: PIZV 5 mcg (Medium Dose) | Percentage of Participants Who Experienced at Least One SAE During the Study | 0.0 percentage of participants |
| Flavivirus-primed Cohort: PIZV 10 mcg (High Dose) | Percentage of Participants Who Experienced at Least One SAE During the Study | 11.1 percentage of participants |