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Study of SP306 Given Intramuscularly Compared to DT Given Subcutaneously in Japanese Adolescents 11 - 12 Years Old

Immunogenicity and Safety of the Tetanus Toxoid, Reduced Diphtheria Toxoid and Acellular Pertussis Vaccine Adsorbed (SP306) Given Intramuscularly Compared to Diphtheria and Tetanus Toxoids Adsorbed (DT) Given Subcutaneously in Japanese Adolescents 11 - 12 Years of Age

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02089347
Enrollment
534
Registered
2014-03-17
Start date
2014-03-31
Completion date
2015-03-31
Last updated
2017-05-30

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

Conditions

Tetanus, Diphtheria, Pertussis

Keywords

Tetanus, Diphtheria, Pertussis, TdaP vaccine, DT vaccine

Brief summary

The aim of the study is to generate additional safety and immunogenicity data to support the registration of the product in Japan. Primary objectives: * To demonstrate the non-inferiority of SP306 versus DT (DT 0.1mL) vaccine in terms of diphtheria and tetanus booster response rate (proportion of subjects with booster responses) and seroprotection rate (percentage of subjects with antitoxin concentrations ≥0.1 IU/mL) at 28 days (window 28-35 days) after one injection in Japanese adolescents 11-12 years of age. * To evaluate the immune response of SP306 against the pertussis antigens PT and FHA in terms of booster response rate (proportion of subjects with booster responses) at 28 days (window 28-35 days) after one injection in Japanese adolescents 11-12 years of age. Secondary objectives: * To further evaluate the immune response of the study vaccines against diphtheria, tetanus and pertussis antigens. * To assess the safety of the study vaccines after one injection in Japanese adolescents 11-12 years of age.

Detailed description

Study participants will receive either a single dose of SP306 vaccine intramuscularly or a dose of DT vaccine subcutaneously. They will be monitored after vaccination for immediate adverse events (AEs) solicited injection site and systemic reactions and unsolicited AEs including serious adverse events throughout the study period, approximately 28 days (+7 days).

Interventions

Sponsors

Sanofi Pasteur, a Sanofi Company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
11 Years to 12 Years
Healthy volunteers
Yes

Inclusion criteria

* Aged 11 or 12 years and considered healthy on the day of inclusion * Informed consent form and assent form signed and dated by the parent(s) / legal representative(s) and the subject respectively * Completed childhood vaccination against diphtheria, pertussis and tetanus (i.e., received 4 doses of Japanese-produced DTaP vaccine), confirmed by checking immunization records and have not yet undergone additional DT vaccination * Able to attend all scheduled visits and to comply with all trial procedures * For female subjects, either pre-menarchal, or post-menarchal with a negative urine pregnancy test.

Exclusion criteria

* Any conditions or diseases which, in the opinion of the Investigator: * would pose a health risk to the subject * or might interfere with the ability to participate fully in the study * or might interfere with evaluation of the vaccine * or would otherwise make participation inappropriate according to the Investigator's clinical judgment * History of diphtheria, tetanus, pertussis, confirmed either clinically, serologically, or microbiologically * Suspected or known hypersensitivity to any of the vaccine components or history of a life threatening reaction to a vaccine containing the same substances of the study vaccine * Vaccination in the last 5 years against tetanus, diphtheria, and/or pertussis * Known or suspected congenital immunodeficiency, or current / previous acquired immunodeficiency, or current / previous receipt of immunosuppressive therapy such as anti-cancer chemotherapy or radiation therapy, or current / previous (within the last 6 months) systemic corticosteroid therapy * Participation in another clinical trial investigating a vaccine, drug, medical device, or medical procedure in the 4 weeks preceding the trial inclusion * Planned participation in another clinical trial during the present trial period * Receipt of blood or blood-derived products in the past 3 months, that might interfere with assessment of the immune response * Receipt of any vaccine within the 4 weeks preceding the trial vaccination, except for influenza vaccination, which may be received at least 2 weeks before the study vaccine * Planned receipt of any vaccine during the trial period * Clinical or known serological evidence of systemic illness including Hepatitis B, Hepatitis C and/or Human Immunodeficiency Virus (HIV) infection * At high risk for diphtheria, tetanus or pertussis infection during the trial * Known pregnancy, or a positive urine pregnancy test * Currently breastfeeding a child * Known thrombocytopenia or history of thrombocytopenia * Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion * History of acute disseminated encephalomyelitis, encephalopathy, Guillain-Barré Syndrome (GBS), or autoimmune disease * Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily * Current alcohol abuse or drug addiction that might interfere with the ability to comply with trial procedures * Identified as an employee of an Investigator, a study center, a study-affiliated vendor, or the Sponsor, with direct or indirect involvement in the proposed study or other studies under the direction of that Investigator or study center; or identified as a spouse or child (whether natural or adopted) of such an employee.

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants With Diphtheria and Tetanus Post-vaccination Booster Response Following Vaccination With Either SP306 or DTDay 28 post-vaccinationDiphtheria booster response was defined as a ≥4-fold rise in pre- to post-vaccination antitoxin concentration in a subject with a pre-vaccination antitoxin concentration ≤ 2.56 IU/mL or a ≥ 2-fold rise in a subject with a pre-vaccination antitoxin concentration \>2.56 IU/mL. A tetanus booster response is defined as a ≥ 4-fold rise in pre- to post-vaccination antitoxin concentration in a subject with a pre-vaccination antitoxin concentration ≤ 2.7 IU/mL or a ≥ 2-fold rise in a subject with a pre-vaccination antitoxin concentration \>2.7 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method
Percentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Post-booster Vaccination With Either SP306 or DT VaccineDay 28 post-vaccinationSeroprotection was defined as the proportion of subjects at 28 days post-vaccination with diphtheria and tetanus antitoxin concentration ≥0.1 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method
Percentage of Participants With Pertussis Booster Response Following Vaccination With Either SP306 or DT VaccineDay 28 post-vaccinationPertussis booster response was defined as a pre-vaccination antibody concentration less than the lower limit of quantitation (LLOQ) and a post vaccination level ≥ 4XLLOQ; or a pre-vaccination antibody concentration ≥ LLOQ but \< 4XLLOQ and a 4-fold rise (i.e. post/pre-vaccination ≥ 4); or a pre-vaccination antibody concentrations ≥ 4XLLOQ and a 2-fold rise (i.e. post/pre-vaccination ≥2). Pertussis antitoxin concentration were assayed by the enzyme-linked immunosorbent assay (ELISA) method.

Secondary

MeasureTime frameDescription
Percentage of Participation With Seroprotection to Diphtheria and Tetanus Antigens Before Vaccination With Either SP306 or DT VaccinePre-vaccination (Day 0)Seroprotection was defined as the proportion of participants with pre-vaccination with diphtheria and tetanus antitoxin concentration ≥ 0.1 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method.
Percentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineDay 0 (pre-vaccination) and Day 28 post-vaccinationSeroprotection was defined as the proportion of participants with diphtheria and tetanus antitoxin concentration level ≥ 0.01 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method.
Geometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineDay 0 (pre-vaccination) and Day 28 post-vaccinationDiphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method
Percentage of Participants With Pertussis (Pertactin and Fimbriae Types 2 and 3) Booster Response Following Vaccination With Either SP306 or DT VaccineDay 28 post-vaccinationPertussis booster response was defined as a pre-vaccination antibody concentration less than the lower limit of quantitation (LLOQ) and a post-vaccination level ≥ 4XLLOQ; or a pre-vaccination antibody concentration ≥ LLOQ but \< 4XLLOQ and a 4-fold rise (i.e. post/pre-vaccination ≥ 4); or a pre-vaccination antibody concentrations ≥ 4XLLOQ and a 2-fold rise (i.e. post/pre-vaccination ≥2). Pertussis antitoxin concentration were assayed by the enzyme-linked immunosorbent assay (ELISA) method.
Geometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineDay 0 (pre-vaccination) and Day 28 post-vaccinationPertussis antitoxin concentration were assayed by the enzyme-linked immunosorbent assay (ELISA) method
Percentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineDay 0 up to Day 7 post-vaccinationSolicited injection-site: Pain, Erythema, Swelling; Solicited systemic reactions: Fever (Temperature), Headache, Malaise, and Myalgia. Grade 3 injection-site: Pain Significant, prevents daily activity; Erythema and Swelling \>100 mm. Grade 3 systemic reactions: Fever, \>39˚C; Headache, Malaise, and Myalgia, Significant, prevents daily activity.

Countries

Japan

Participant flow

Recruitment details

The study participants were enrolled from 01 March 2014 through 31 May 2014 at 21 clinic centers in Japan.

Pre-assignment details

A total of 533 participants who met all of the inclusion criteria - including having completed childhood vaccination against diphtheria, pertussis and tetanus (i.e., received 4 doses of Japanese-produced DTaP vaccine), and none of the exclusion criteria were randomized and vaccinated in this study.

Participants by arm

ArmCount
SP306 Group
Participants received SP306 vaccine intramuscularly
356
DT Group
Participants received DT vaccine subcutaneously
178
Total534

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyProtocol Violation10

Baseline characteristics

CharacteristicDT GroupSP306 GroupTotal
Age, Categorical
<=18 years
178 Participants356 Participants534 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
0 Participants0 Participants0 Participants
Age, Continuous
Age Continuous
11.2 Years
STANDARD_DEVIATION 0.4
11.2 Years
STANDARD_DEVIATION 0.4
11.2 Years
STANDARD_DEVIATION 0.4
Region of Enrollment
Japan
178 Participants356 Participants534 Participants
Sex: Female, Male
Female
83 Participants183 Participants266 Participants
Sex: Female, Male
Male
95 Participants173 Participants268 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
19 / 35612 / 178
serious
Total, serious adverse events
0 / 3560 / 178

Outcome results

Primary

Percentage of Participants With Diphtheria and Tetanus Post-vaccination Booster Response Following Vaccination With Either SP306 or DT

Diphtheria booster response was defined as a ≥4-fold rise in pre- to post-vaccination antitoxin concentration in a subject with a pre-vaccination antitoxin concentration ≤ 2.56 IU/mL or a ≥ 2-fold rise in a subject with a pre-vaccination antitoxin concentration \>2.56 IU/mL. A tetanus booster response is defined as a ≥ 4-fold rise in pre- to post-vaccination antitoxin concentration in a subject with a pre-vaccination antitoxin concentration ≤ 2.7 IU/mL or a ≥ 2-fold rise in a subject with a pre-vaccination antitoxin concentration \>2.7 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method

Time frame: Day 28 post-vaccination

Population: Post-vaccination booster response was determined in the per-protocol population

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participants With Diphtheria and Tetanus Post-vaccination Booster Response Following Vaccination With Either SP306 or DTDiphtheria Booster Response99.7 Percentage of Participants
SP306 GroupPercentage of Participants With Diphtheria and Tetanus Post-vaccination Booster Response Following Vaccination With Either SP306 or DTTetanus Booster Response100 Percentage of Participants
DT GroupPercentage of Participants With Diphtheria and Tetanus Post-vaccination Booster Response Following Vaccination With Either SP306 or DTDiphtheria Booster Response98.3 Percentage of Participants
DT GroupPercentage of Participants With Diphtheria and Tetanus Post-vaccination Booster Response Following Vaccination With Either SP306 or DTTetanus Booster Response93.8 Percentage of Participants
Comparison: Non-inferiority comparison of post-booster response for Diphtheria.95% CI: [-0.31, 4.61]
Comparison: Non-inferiority comparison of post-vaccination booster response for tetanus95% CI: [3.32, 10.84]
Primary

Percentage of Participants With Pertussis Booster Response Following Vaccination With Either SP306 or DT Vaccine

Pertussis booster response was defined as a pre-vaccination antibody concentration less than the lower limit of quantitation (LLOQ) and a post vaccination level ≥ 4XLLOQ; or a pre-vaccination antibody concentration ≥ LLOQ but \< 4XLLOQ and a 4-fold rise (i.e. post/pre-vaccination ≥ 4); or a pre-vaccination antibody concentrations ≥ 4XLLOQ and a 2-fold rise (i.e. post/pre-vaccination ≥2). Pertussis antitoxin concentration were assayed by the enzyme-linked immunosorbent assay (ELISA) method.

Time frame: Day 28 post-vaccination

Population: Post-vaccination pertussis booster response was determined in the per-protocol population

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participants With Pertussis Booster Response Following Vaccination With Either SP306 or DT VaccinePertussis Toxoid39.1 Percentage of Participants
SP306 GroupPercentage of Participants With Pertussis Booster Response Following Vaccination With Either SP306 or DT VaccineFilamentous Hemagglutinin95.1 Percentage of Participants
DT GroupPercentage of Participants With Pertussis Booster Response Following Vaccination With Either SP306 or DT VaccinePertussis Toxoid1.1 Percentage of Participants
DT GroupPercentage of Participants With Pertussis Booster Response Following Vaccination With Either SP306 or DT VaccineFilamentous Hemagglutinin2.3 Percentage of Participants
Primary

Percentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Post-booster Vaccination With Either SP306 or DT Vaccine

Seroprotection was defined as the proportion of subjects at 28 days post-vaccination with diphtheria and tetanus antitoxin concentration ≥0.1 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method

Time frame: Day 28 post-vaccination

Population: Seroprotection was assessed in the per-protocol population

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Post-booster Vaccination With Either SP306 or DT VaccineDiphtheria100 Percentage of Participants
SP306 GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Post-booster Vaccination With Either SP306 or DT VaccineTetanus100 Percentage of Participants
DT GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Post-booster Vaccination With Either SP306 or DT VaccineDiphtheria99.4 Percentage of Participants
DT GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Post-booster Vaccination With Either SP306 or DT VaccineTetanus100 Percentage of Participants
Comparison: Non-inferiority comparison of Diphtheria post-vaccination seroprotection rates at ≥ 0.1 IU/mL95% CI: [-0.61, 3.15]
Comparison: Non-inferiority comparison of Tetanus post-vaccination seroprotection rates at ≥ 0.1 IU/mL95% CI: [-1.09, 2.14]
Secondary

Geometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT Vaccine

Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method

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

Population: Geometric Mean Concentration were assessed in the per-protocol population

ArmMeasureGroupValue (GEOMETRIC_MEAN)
SP306 GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (pre-vaccination)0.10 Titers
SP306 GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineTetanus (pre-vaccination)0.25 Titers
SP306 GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (post-vaccination)8.64 Titers
SP306 GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineTetanus (post-vaccination)26.15 Titers
DT GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (post-vaccination)10.08 Titers
DT GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (pre-vaccination)0.10 Titers
DT GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineTetanus (post-vaccination)7.58 Titers
DT GroupGeometric Mean Concentration of Diphtheria and Tetanus Antibodies Before and Following Vaccination With Either SP306 or DT VaccineTetanus (pre-vaccination)0.24 Titers
Secondary

Geometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT Vaccine

Pertussis antitoxin concentration were assayed by the enzyme-linked immunosorbent assay (ELISA) method

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

Population: Geometric Mean Concentration was assessed in the per-protocol population

ArmMeasureGroupValue (GEOMETRIC_MEAN)
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertussis toxoid (post-vaccination)23.83 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertactin (pre-vaccination)7.02 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFilamentous Hemagglutinin (pre-vaccination)19.14 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFilamentous Hemagglutinin (post-vaccination)160.66 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFimbriae (post-vaccination)233.01 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFimbriae (pre-vaccination)3.43 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertussis toxoid (pre-vaccination)6.27 Titers
SP306 GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertactin (post-vaccination)129.59 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFimbriae (post-vaccination)3.63 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertactin (pre-vaccination)8.20 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertactin (post-vaccination)7.94 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertussis toxoid (pre-vaccination)6.15 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccinePertussis toxoid (post-vaccination)6.07 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFilamentous Hemagglutinin (post-vaccination)21.16 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFimbriae (pre-vaccination)3.68 Titers
DT GroupGeometric Mean Concentration of Pertussis Antibodies Before and Following Vaccination With Either SP306 or DT VaccineFilamentous Hemagglutinin (pre-vaccination)21.55 Titers
Secondary

Percentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT Vaccine

Solicited injection-site: Pain, Erythema, Swelling; Solicited systemic reactions: Fever (Temperature), Headache, Malaise, and Myalgia. Grade 3 injection-site: Pain Significant, prevents daily activity; Erythema and Swelling \>100 mm. Grade 3 systemic reactions: Fever, \>39˚C; Headache, Malaise, and Myalgia, Significant, prevents daily activity.

Time frame: Day 0 up to Day 7 post-vaccination

Population: Solicited injection-site reactions and systemic reactions were assessed in the Safety Analysis Set.

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineInjection-site Erythema20.2 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineMalaise23.9 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site Erythema1.4 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Myalgia0.3 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineInjection-site Swelling20.2 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site Pain0 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site Swelling1.4 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineAny solicited systemic reaction60.7 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineAny Injection-site reaction83.1 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Solicited systemic reaction0.8 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site reaction2.2 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Malaise0.3 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Fever0.6 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineInjection-site Pain80.1 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineHeadache20.5 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineFever9.3 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Headache0.3 Percentage of Participants
SP306 GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineMyalgia44.1 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Headache0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site Swelling0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineMalaise13.5 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Malaise0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineMyalgia20.2 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Myalgia0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site reaction0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineInjection-site Pain48.3 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site Pain0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineInjection-site Erythema27.5 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Injection-site Erythema0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineInjection-site Swelling22.5 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineAny solicited systemic reaction32.0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Solicited systemic reaction0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineFever2.2 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineGrade 3 Fever0 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineHeadache12.4 Percentage of Participants
DT GroupPercentage of Participants Reporting Solicited Injection-site and Systemic Reactions Following a Single Booster Dose of SP306 or DT VaccineAny Injection-site reaction64.0 Percentage of Participants
Secondary

Percentage of Participants With Pertussis (Pertactin and Fimbriae Types 2 and 3) Booster Response Following Vaccination With Either SP306 or DT Vaccine

Pertussis booster response was defined as a pre-vaccination antibody concentration less than the lower limit of quantitation (LLOQ) and a post-vaccination level ≥ 4XLLOQ; or a pre-vaccination antibody concentration ≥ LLOQ but \< 4XLLOQ and a 4-fold rise (i.e. post/pre-vaccination ≥ 4); or a pre-vaccination antibody concentrations ≥ 4XLLOQ and a 2-fold rise (i.e. post/pre-vaccination ≥2). Pertussis antitoxin concentration were assayed by the enzyme-linked immunosorbent assay (ELISA) method.

Time frame: Day 28 post-vaccination

Population: Post-vaccination pertussis booster response was determined in the per-protocol population

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participants With Pertussis (Pertactin and Fimbriae Types 2 and 3) Booster Response Following Vaccination With Either SP306 or DT VaccinePertactin90.3 Percentage of Participants
SP306 GroupPercentage of Participants With Pertussis (Pertactin and Fimbriae Types 2 and 3) Booster Response Following Vaccination With Either SP306 or DT VaccineFimbriae Types 2 and 394.6 Percentage of Participants
DT GroupPercentage of Participants With Pertussis (Pertactin and Fimbriae Types 2 and 3) Booster Response Following Vaccination With Either SP306 or DT VaccinePertactin0.6 Percentage of Participants
DT GroupPercentage of Participants With Pertussis (Pertactin and Fimbriae Types 2 and 3) Booster Response Following Vaccination With Either SP306 or DT VaccineFimbriae Types 2 and 30.6 Percentage of Participants
Secondary

Percentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT Vaccine

Seroprotection was defined as the proportion of participants with diphtheria and tetanus antitoxin concentration level ≥ 0.01 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method.

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

Population: Seroprotection was assessed in the per-protocol population

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (Pre-vaccination)97.4 Percentage of Participants
SP306 GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (Post-vaccination)100 Percentage of Participants
SP306 GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineTetanus (Pre-vaccination)100 Percentage of Participants
SP306 GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineTetanus (Post-vaccination)100 Percentage of Participants
DT GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineTetanus (Post-vaccination)100 Percentage of Participants
DT GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (Pre-vaccination)97.7 Percentage of Participants
DT GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineTetanus (Pre-vaccination)99.4 Percentage of Participants
DT GroupPercentage of Participants With Seroprotection to Diphtheria and Tetanus Antigens Before and Following Vaccination With Either SP306 or DT VaccineDiphtheria (Post-vaccination)99.4 Percentage of Participants
Secondary

Percentage of Participation With Seroprotection to Diphtheria and Tetanus Antigens Before Vaccination With Either SP306 or DT Vaccine

Seroprotection was defined as the proportion of participants with pre-vaccination with diphtheria and tetanus antitoxin concentration ≥ 0.1 IU/mL. Diphtheria antitoxin concentration was assayed by the toxin neutralization test; Tetanus antitoxin concentration was assayed by the enzyme-linked immunosorbent assay (ELISA) method.

Time frame: Pre-vaccination (Day 0)

Population: Seroprotection was assessed in the per-protocol population

ArmMeasureGroupValue (NUMBER)
SP306 GroupPercentage of Participation With Seroprotection to Diphtheria and Tetanus Antigens Before Vaccination With Either SP306 or DT VaccineDiphtheria46.6 Percentage of Participants
SP306 GroupPercentage of Participation With Seroprotection to Diphtheria and Tetanus Antigens Before Vaccination With Either SP306 or DT VaccineTetanus77.1 Percentage of Participants
DT GroupPercentage of Participation With Seroprotection to Diphtheria and Tetanus Antigens Before Vaccination With Either SP306 or DT VaccineDiphtheria46.6 Percentage of Participants
DT GroupPercentage of Participation With Seroprotection to Diphtheria and Tetanus Antigens Before Vaccination With Either SP306 or DT VaccineTetanus77.8 Percentage of Participants

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