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Safety and Immunogenicity of Fluzone® Quadrivalent and Fluzone® High-Dose, Influenza Vaccines

Safety and Immunogenicity of Fluzone® Quadrivalent and Fluzone® High-Dose, Influenza Vaccines, 2017-2018 Formulations

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03308825
Enrollment
240
Registered
2017-10-13
Start date
2017-09-11
Completion date
2017-11-22
Last updated
2022-03-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Flu, Influenza

Keywords

Influenza, Flu

Brief summary

The aim of the study was to describe the safety and immunogenicity of the 2017-2018 formulation of Fluzone Quadrivalent vaccine in children 6 months to \< 9 years of age, and in adults 18 to \< 65 years of age, and to describe the safety and immunogenicity of the 2017-2018 formulation of Fluzone High-Dose vaccine in adults ≥ 65 years of age.

Detailed description

All participants received 1 intramuscular dose of their assigned vaccine during Visit 1. For participants, for whom 2 doses of influenza vaccine were recommended per Advisory Committee on Immunization Practices (ACIP) guidance, a second dose of the same volume as the first dose was administered during Visit 2 (28 days after Visit 1). Solicited adverse reaction (AR) information was collected for 7 days following each vaccination. Unsolicited non-serious adverse event (AE) and serious adverse event (SAE) information was collected from Visit 1 to Visit 2 or from Visit 1 to Visit 3 for those participants receiving 2 doses of study vaccine. Immunogenicity was evaluated in all participants prior to vaccination on Day 0 (Visit 1) and after the final vaccination (Day 28 post-final vaccination for participants 6 months to \< 9 years of age and Day 21 post-vaccination for participants ≥ 18 years of age).

Interventions

BIOLOGICALFluzone Quadrivalent vaccine

0.25 mL, Intramuscular

BIOLOGICALFluzone High-Dose vaccine

0.5 mL, Intramuscular

Sponsors

Sanofi Pasteur, a Sanofi Company
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Intervention model description

Multicenter, Open-label, Phase IV Study

Eligibility

Sex/Gender
ALL
Age
6 Months to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Aged 6 months to \< 9 years or ≥ 18 years on the day of first study vaccination (study product administration). * For participants 6 to \< 12 months of age, born at full term of pregnancy (≥ 37 weeks) and with a birth weight ≥ 2.5 kg (5.5 lbs). * Informed consent form has been signed and dated by participants ≥ 18 years of age. * Assent form was signed and dated by participants 7 to \< 9 years of age, and informed consent form has been signed and dated by parent(s) or guardian(s) for participants 6 months to \< 9 years of age. * Participant and parent/guardian (of participants 6 months to \< 9 years of age) were able to attend all scheduled visits and to comply with all study procedures.

Exclusion criteria

* Participant was pregnant, or lactating, or of childbearing potential and not using an effective method of contraception or abstinence from at least 4 weeks prior to vaccination and until at least 4 weeks after vaccination. To be considered of non-childbearing potential, a female must be pre-menarche, or post- menopausal for at least 1 year, or surgically sterile. * Participation at the time of study enrollment (or in the 30 days preceding the first study vaccination) or planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure. Note: Participants may be considered eligible for enrollment if no intervention for the other study occurred within the 30 days prior to the first study vaccination and none are planned before the participant would complete safety surveillance for the present study. * Receipt of any vaccine in the 30 days preceding the first study vaccination, or planned receipt of any vaccine before Visit 2 for participants receiving 1 dose of influenza vaccine or Visit 3 for participants receiving 2 doses of influenza vaccine. * Previous vaccination against influenza (in the 2017-2018 influenza season) with either study vaccine or another vaccine. * Receipt of immune globulins, blood, or blood-derived products in the 3 months preceding planned inclusion. * Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the 6 months preceding planned inclusion; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the 3 months preceding planned inclusion). * Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to study vaccine or to a vaccine containing any of the same substances. Note: The list of vaccine components is included in the Prescribing Information for each study vaccine. * Thrombocytopenia, which may be a contraindication for intramuscular vaccination, at the discretion of the Investigator. * Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating intramuscular vaccination. * Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily. * Current alcohol abuse or drug addiction. * Chronic illness that, in the opinion of the Investigator, was at a stage where it might interfere with study conduct or completion. * Moderate or severe acute illness/infection (according to Investigator judgment) on the day of planned vaccination or febrile illness (temperature ≥ 100.4 degree Fahrenheit \[°F\] \[38.0 degrees Celsius {°C}\]). A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided. * Identified as an Investigator or employee of the Investigator or study center with direct involvement in the proposed study (participants ≥ 18 years of age) or identified as an immediate family member (i.e., parent, spouse, natural or adopted child) of the Investigator or employee with direct involvement in the proposed study (all participants). * History of serious adverse reaction to any influenza vaccine. * Personal history of Guillain-Barré syndrome. * Any condition that in the opinion of the Investigator would pose a health risk to the participant if enrolled or could interfere with the evaluation of the vaccine. * Personal history of clinically significant developmental delay (at the discretion of the Investigator), neurologic disorder, or seizure disorder. * Known seropositivity for human immunodeficiency virus, hepatitis B, or hepatitis C.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Within 7 days after any vaccinationSolicited injection site reactions: Pain, Erythema and Swelling (Grade 3: Pain: cries when injected limb moved/ limb movement reduced, erythema and swelling \>= 50 mm). Solicited systemic reactions: Fever, vomiting, abnormal crying, drowsiness, appetite lost, Irritability (Grade 3: Fever: \>= 39.5 degrees Celsius \[103.1 degree Fahrenheit {°F}\], vomiting \>= six episodes per 24 hours, abnormal crying : \> 3 hours, drowsiness: sleeping most of the time or difficult to wake up, appetite lost: refuses \>= 3 feeds/meals or refuses most feeds/meals, Irritability: Inconsolable).
Number of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Within 7 days after any vaccinationSolicited injection site reactions: Pain (Group 2: Grade 3: Incapacitating; Group 3 and 4: Grade 3: significant; prevents daily activity), erythema & swelling (Group 2: Grade 3: \>= 50 mm, Group 3 and 4: Grade 3: \> 100 mm). Solicited systemic reactions: Fever (Grade 3: \>= 39.0 degrees Celsius \[102.2°F\]), headache, malaise & myalgia (Grade 3: significant interference with daily activities).
Geometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Day 0 (pre-vaccination) and Day 28 (post-vaccination)Anti-influenza antibodies were measured using the hemagglutination inhibition (HAI) assay for 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage.
GMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Day 0 (pre-vaccination) and Day 21 (post-vaccination)Anti-influenza antibodies were measured using the HAI assay for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4).
GMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Day 0 (pre-vaccination) and Day 28 (post-final vaccination)GMTRs are the geometric means of the individual post-final vaccination/pre-vaccination titer ratios for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage, measured using the HAI assay.
GMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Day 0 (pre-vaccination) and Day 21 (post-vaccination)GMTRs are the geometric means of the individual post-final vaccination/pre-vaccination titer ratios for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4), measured using the HAI assay.
Number of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Day 0 (pre-vaccination) and Day 28 (post-vaccination)Anti-influenza antibodies were measured using the HAI assay for 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage. Seroprotection was defined as antibody titer \>=40 (1/ dilution) at pre-vaccination or at post-final vaccination.
Number of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Day 0 (pre-vaccination) and Day 21 (post-vaccination)Anti-influenza antibodies were measured using the HAI assay for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4). Seroprotection was defined as antibody titer \>= 40 (1/ dilution) at pre-vaccination or at post-final vaccination.
Number of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Day 0 (pre-vaccination) and Day 28 (post-final vaccination)Anti-influenza antibodies were measured using the HAI assay for 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage. Seroconversion was defined as either a pre-vaccination HAI titer \< 1:10 and a post-final vaccination titer \>= 1:40 or a pre-vaccination titer \>= 1:10 and at least a 4-fold increase in post-final vaccination titer.
Number of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Day 0 (pre-vaccination) and Day 21 (post-vaccination)Anti-influenza antibodies were measured using the HAI assay for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4). Seroconversion was defined as either a pre-vaccination HAI titer \< 1:10 and a post-final vaccination titer \>= 1:40 or a pre-vaccination titer \>= 1:10 and at least a 4-fold increase in post-final vaccination titer.

Countries

United States

Participant flow

Recruitment details

Study participants were enrolled in 3 centers in the United States from 11 September 2017 to 25 October 2017.

Pre-assignment details

A total of 240 participants were enrolled and vaccinated in the study.

Participants by arm

ArmCount
Group 1: 6 to < 36 Months
Children aged 6 to \< 36 months received a 0.25-mL dose of Fluzone Quadrivalent vaccine, intramuscularly, at Day 0. For participants for whom 2 doses of influenza vaccine were recommended, a second dose was administered on Day 28.
59
Group 2: 3 to < 9 Years
Children aged 3 to \< 9 years received a 0.5-mL dose of Fluzone Quadrivalent vaccine, intramuscularly, at Day 0. For participants for whom 2 doses of influenza vaccine were recommended, a second dose was administered on Day 28.
61
Group 3: 18 to < 65 Years
Adults aged 18 to \< 65 years received a 0.5-mL dose of Fluzone Quadrivalent vaccine, intramuscularly, at Day 0.
60
Group 4: >= 65 Years
Adults aged \>= 65 years received a 0.5-mL dose of Fluzone High-Dose vaccine, intramuscularly, at Day 0.
60
Total240

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyLost to Follow-up2210
Overall StudyProtocol Violation0200

Baseline characteristics

CharacteristicGroup 1: 6 to < 36 MonthsGroup 2: 3 to < 9 YearsGroup 3: 18 to < 65 YearsGroup 4: >= 65 YearsTotal
Age, Categorical
<=18 years
59 Participants61 Participants1 Participants0 Participants121 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants60 Participants60 Participants
Age, Categorical
Between 18 and 65 years
0 Participants0 Participants59 Participants0 Participants59 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
3 Participants6 Participants0 Participants1 Participants10 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
56 Participants55 Participants60 Participants59 Participants230 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants1 Participants1 Participants
Race (NIH/OMB)
Black or African American
29 Participants30 Participants16 Participants5 Participants80 Participants
Race (NIH/OMB)
More than one race
1 Participants6 Participants1 Participants1 Participants9 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
29 Participants25 Participants43 Participants53 Participants150 Participants
Sex: Female, Male
Female
25 Participants31 Participants46 Participants39 Participants141 Participants
Sex: Female, Male
Male
34 Participants30 Participants14 Participants21 Participants99 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 590 / 610 / 600 / 60
other
Total, other adverse events
30 / 5930 / 6129 / 6030 / 60
serious
Total, serious adverse events
0 / 590 / 612 / 600 / 60

Outcome results

Primary

Geometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)

Anti-influenza antibodies were measured using the hemagglutination inhibition (HAI) assay for 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage.

Time frame: Day 0 (pre-vaccination) and Day 28 (post-vaccination)

Population: Per-Protocol Analysis Set (PPAS) included all participants who received at least 1dose of study vaccine, had a valid post-final vaccination serology result for at least 1 strain and did not have any major protocol deviations. Here, Number analyzed corresponds to participants with available data for each listed strain.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H1N119.9 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H3N249.7 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Victoria32.0 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Yamagata43.5 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H1N1450 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H3N2568 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Victoria481 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Yamagata698 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Yamagata2187 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H1N1306 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H1N11606 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H3N2415 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Victoria1668 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Victoria180 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H3N22370 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGeometric Mean Titers (GMTs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Yamagata334 Titers (1/dilutions)
Primary

GMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)

GMTRs are the geometric means of the individual post-final vaccination/pre-vaccination titer ratios for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage, measured using the HAI assay.

Time frame: Day 0 (pre-vaccination) and Day 28 (post-final vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain.

ArmMeasureGroupValue (NUMBER)
Group 1: 6 to < 36 MonthsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H1N117.6 Titer Ratio
Group 1: 6 to < 36 MonthsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H3N210.8 Titer Ratio
Group 1: 6 to < 36 MonthsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Victoria13.1 Titer Ratio
Group 1: 6 to < 36 MonthsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Yamagata14.0 Titer Ratio
Group 3: 18 to < 65 YearsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Yamagata6.46 Titer Ratio
Group 3: 18 to < 65 YearsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H1N15.05 Titer Ratio
Group 3: 18 to < 65 YearsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Victoria9.02 Titer Ratio
Group 3: 18 to < 65 YearsGMT Ratios (GMTRs) of Influenza Vaccine Antibodies in Children: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H3N25.54 Titer Ratio
Primary

GMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)

GMTRs are the geometric means of the individual post-final vaccination/pre-vaccination titer ratios for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4), measured using the HAI assay.

Time frame: Day 0 (pre-vaccination) and Day 21 (post-vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain and 0 in the number analyzed field signifies that none of the participants were analyzed, since the 2017-2018 formulation of Fluzone High-Dose vaccine did not contain the B Yagamata lineage strain.

ArmMeasureGroupValue (NUMBER)
Group 1: 6 to < 36 MonthsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)B Victoria4.05 Titer Ratio
Group 1: 6 to < 36 MonthsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H3N24.44 Titer Ratio
Group 1: 6 to < 36 MonthsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)B Yamagata3.09 Titer Ratio
Group 1: 6 to < 36 MonthsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H1N14.31 Titer Ratio
Group 3: 18 to < 65 YearsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H3N24.45 Titer Ratio
Group 3: 18 to < 65 YearsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H1N15.15 Titer Ratio
Group 3: 18 to < 65 YearsGMTRs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)B Victoria2.96 Titer Ratio
Primary

GMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)

Anti-influenza antibodies were measured using the HAI assay for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4).

Time frame: Day 0 (pre-vaccination) and Day 21 (post-vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain and 0 in the number analyzed field signifies that none of the participants were analyzed, since the 2017-2018 formulation of Fluzone High-Dose vaccine did not contain the B Yagamata lineage strain.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: B Yamagata1312 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: B Victoria276 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: B Yamagata425 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H1N1756 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H3N21128 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: B Victoria1117 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H1N1165 Titers (1/dilutions)
Group 1: 6 to < 36 MonthsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H3N2231 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H1N174.6 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H3N2864 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H3N2194 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H1N1393 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: B Victoria215 Titers (1/dilutions)
Group 3: 18 to < 65 YearsGMTs of Influenza Vaccine Antibodies in Adults: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: B Victoria644 Titers (1/dilutions)
Primary

Number of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)

Solicited injection site reactions: Pain (Group 2: Grade 3: Incapacitating; Group 3 and 4: Grade 3: significant; prevents daily activity), erythema & swelling (Group 2: Grade 3: \>= 50 mm, Group 3 and 4: Grade 3: \> 100 mm). Solicited systemic reactions: Fever (Grade 3: \>= 39.0 degrees Celsius \[102.2°F\]), headache, malaise & myalgia (Grade 3: significant interference with daily activities).

Time frame: Within 7 days after any vaccination

Population: Analysis was performed using Safety Analysis Set. Here, Number analyzed corresponds to participants with available data for each listed solicited reaction.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Malaise3 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Swelling : Grade 32 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Erythema9 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Headache : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Fever1 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Pain: Grade 31 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Headache2 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Fever : Grade 31 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Malaise: Grade 31 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Erythema : Grade 33 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Myalgia : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Pain25 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Swelling11 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Myalgia11 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Malaise5 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Pain27 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Pain: Grade 31 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Erythema0 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Erythema : Grade 30 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Swelling1 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Swelling : Grade 30 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Fever0 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Fever : Grade 30 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Headache10 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Headache : Grade 31 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Malaise: Grade 31 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Myalgia13 Participants
Group 3: 18 to < 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Myalgia : Grade 31 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Myalgia17 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Headache : Grade 30 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Swelling2 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Erythema : Grade 30 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Malaise9 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Erythema3 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Pain20 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Malaise: Grade 30 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Pain: Grade 30 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Fever : Grade 31 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Fever1 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Myalgia : Grade 31 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Headache6 Participants
Group 4: >= 65 YearsNumber of Participants Reporting Solicited Injection Site (Pain, Erythema, Swelling) and Systemic Reactions(Fever, Headache, Malaise, Myalgia): Group 2 (3 to < 9 Years), Group 3 (18 to < 65 Years) and Group 4(=< 65 Years)Swelling : Grade 30 Participants
Primary

Number of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)

Solicited injection site reactions: Pain, Erythema and Swelling (Grade 3: Pain: cries when injected limb moved/ limb movement reduced, erythema and swelling \>= 50 mm). Solicited systemic reactions: Fever, vomiting, abnormal crying, drowsiness, appetite lost, Irritability (Grade 3: Fever: \>= 39.5 degrees Celsius \[103.1 degree Fahrenheit {°F}\], vomiting \>= six episodes per 24 hours, abnormal crying : \> 3 hours, drowsiness: sleeping most of the time or difficult to wake up, appetite lost: refuses \>= 3 feeds/meals or refuses most feeds/meals, Irritability: Inconsolable).

Time frame: Within 7 days after any vaccination

Population: Analysis was performed using the Safety Analysis Set. Here, Number analyzed corresponds to participants with available data for each listed solicited reaction.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Tenderness16 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Tenderness : Grade 31 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Erythema4 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Erythema : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Swelling2 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Swelling : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Fever6 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Fever : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Vomiting2 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Vomiting : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Crying Abnormal10 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Crying Abnormal : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Drowsiness11 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Drowsiness : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Appetite Lost7 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Appetite Lost : Grade 30 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Irritability13 Participants
Group 1: 6 to < 36 MonthsNumber of Participants Reporting Solicited Injection Site (Tenderness/Pain, Erythema, Swelling) and Systemic Reactions (Fever, Vomiting, Crying Abnormal, Drowsiness, Appetite Lost, Irritability): Group 1 (6 to < 36 Months)Irritability : Grade 30 Participants
Primary

Number of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)

Anti-influenza antibodies were measured using the HAI assay for 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage. Seroconversion was defined as either a pre-vaccination HAI titer \< 1:10 and a post-final vaccination titer \>= 1:40 or a pre-vaccination titer \>= 1:10 and at least a 4-fold increase in post-final vaccination titer.

Time frame: Day 0 (pre-vaccination) and Day 28 (post-final vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H1N145 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H3N242 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Victoria44 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Yamagata46 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Yamagata36 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H1N128 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)B Victoria39 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)A/H3N230 Participants
Primary

Number of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)

Anti-influenza antibodies were measured using the HAI assay for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4). Seroconversion was defined as either a pre-vaccination HAI titer \< 1:10 and a post-final vaccination titer \>= 1:40 or a pre-vaccination titer \>= 1:10 and at least a 4-fold increase in post-final vaccination titer.

Time frame: Day 0 (pre-vaccination) and Day 21 (post-vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain and 0 in the number analyzed field signifies that none of the participants were analyzed, since the 2017-2018 formulation of Fluzone High-Dose vaccine did not contain the B Yagamata lineage strain.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)B Victoria19 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H3N222 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)B Yamagata22 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H1N126 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H3N233 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)A/H1N133 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroconversion to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)B Victoria18 Participants
Primary

Number of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)

Anti-influenza antibodies were measured using the HAI assay for 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage. Seroprotection was defined as antibody titer \>=40 (1/ dilution) at pre-vaccination or at post-final vaccination.

Time frame: Day 0 (pre-vaccination) and Day 28 (post-vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H1N115 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H3N224 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Victoria21 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Yamagata31 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H1N151 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H3N250 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Victoria50 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Yamagata50 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Yamagata55 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H1N148 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H1N154 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: A/H3N246 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: B Victoria54 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Victoria44 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Post-Final Vaccination: A/H3N254 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 1 (6 to < 36 Months) and Group 2 (3 to < 9 Years)Pre-Vaccination: B Yamagata50 Participants
Primary

Number of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)

Anti-influenza antibodies were measured using the HAI assay for each of the following 4 strains: H1N1, H3N2, B Victoria lineage, and B Yamagata lineage (for Group 3) and for 3 strains: H1N1, H3N2, and B Victoria lineage (for Group 4). Seroprotection was defined as antibody titer \>= 40 (1/ dilution) at pre-vaccination or at post-final vaccination.

Time frame: Day 0 (pre-vaccination) and Day 21 (post-vaccination)

Population: Analysis was performed on PPAS. Here, Number analyzed corresponds to participants with available data for each listed strain and 0 in the number analyzed field signifies that none of the participants were analyzed, since the 2017-2018 formulation of Fluzone High-Dose vaccine did not contain the B Yagamata lineage strain.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: B Yamagata56 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: B Victoria48 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: B Yamagata54 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H1N155 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H3N255 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: B Victoria56 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H1N145 Participants
Group 1: 6 to < 36 MonthsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H3N248 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H1N140 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H3N259 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: A/H3N249 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: A/H1N157 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Pre-Vaccination: B Victoria55 Participants
Group 3: 18 to < 65 YearsNumber of Participants With Seroprotection to Influenza Vaccine Antigens: Group 3 (18 to < 65 Years) and Group 4 (>= 65 Years)Post-Final Vaccination: B Victoria58 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026