E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Prevention of influenza infection |
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E.1.1.1 | Medical condition in easily understood language |
Active immunisation against influenza
infection |
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E.1.1.2 | Therapeutic area | Diseases [C] - Virus Diseases [C02] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10022000 |
E.1.2 | Term | Influenza |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To describe the safety of each dosage of high-dose quadrivalent influenza vaccine (QIV-HD) used in the study during the 28 days following each vaccination, and serious adverse events (including adverse events of special interest throughout the study
To describe the antibody response induced by each dosage of QIV-HD used in the study compared with unadjuvanted standard-dose quadrivalent influenza vaccine (QIV-SD) by hemagglutination inhibition (HAI)
To describe the antibody response induced by each dosage of QIV-HD used in the study compared with unadjuvanted QIV-SD by virus seroneutralization (SN) measurement methods
To describe the antibody response induced by the highest acceptable dosage of QIV-HD compared with adjuvanted trivalent influenza vaccine (TIV) by HAI and virus SN measurement methods
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E.2.2 | Secondary objectives of the trial |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
- Aged 6 months to 17 years on the day of inclusion
- Assent form has been signed and dated by the subject (7 to 17 years of age) and informed consent form has been signed and dated by the parent(s) or guardian(s) and by an independent witness, if required by local regulations
- Subject / and subject and parent / guardian are able to attend all scheduled visits and to comply with all study procedures
- For subjects aged < 24 months: Born at full term of pregnancy (≥ 37 weeks) and/or with a birth weight ≥ 2.5 kg
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E.4 | Principal exclusion criteria |
Subject is 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 until at least 4 weeks after vaccination. To be considered of non-childbearing potential, a female must be pre-menarche
- Participation at the time of study enrollment (or in the 4 weeks 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
- Receipt of any vaccine in the 30 days preceding the first study vaccination, or planned receipt of any vaccine before Visit 3 for subjects receiving 1 dose of influenza vaccine or Visit 5 for subjects receiving 2 doses of influenza vaccine
- For previously influenza vaccinated subjects: Previous vaccination against influenza in the preceding 6 months with either the study vaccine or another vaccine
- For previously influenza unvaccinated subjects: Any influenza vaccination (from birth to the day of inclusion) with either the study vaccine or another influenza vaccine
- For previously influenza unvaccinated subjects: Any previous laboratory confirmed influenza infection (from birth to the day of inclusion)
- Receipt of immune globulins, blood or blood-derived products in the past 3 months
- Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months)
- Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccines used in the study or to a vaccine containing any of the same substances
- Thrombocytopenia or bleeding disorder, contraindicating IM vaccination based on Investigator’s judgement
- 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, is 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 vaccination or febrile illness (temperature ≥ 38.0°C [≥ 100.4°F]). A prospective subject should not be included in the study until the condition has resolved or the febrile event has subsided
- Identified as an immediate family member (ie, spouse, natural or adopted child, grandchild, nephew, or niece) of the Investigator or employee with direct involvement in the proposed study
- Personal history of GBS
- Any condition that in the opinion of the Investigator would pose a health risk to the subject if enrolled or could interfere with the evaluation of the vaccine
- Personal history of clinically significant development delay (at the discretion of the Investigator), neurologic disorder, or seizure disorder
- Known seropositivity for hepatitis B or hepatitis C
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E.5 End points |
E.5.1 | Primary end point(s) |
1/ Number of participants reporting solicited injection site reactions or systemic reactions; Injection site reactions: tenderness/pain, erythema, swelling, induration and bruising.
Systemic reactions for participants < 36 months: fever, vomiting, crying abnormal, drowsiness, appetite lost, and irritability; 3 to 17 years: fever, headache, malaise, myalgia, and shivering
2/ Geometric mean titers (GMTs) of influenza vaccine antibodies; Antibody titers will be measured by HAI and expressed as GMTs
3/ Influenza vaccine antibody titer ratio; Ratio of titers measured by HAI on Day 28/Day 0 for all participants and Day 56/Day 0 for participants receiving 2 injections
4/ Number of participants with seroconversion; Antibody titers will be measured by HAI.
5/ Number of participants with titers ≥ 40 (1/dil) ; Antibody titers will be measured by HAI
6/ Neutralization titer (NT) titers of influenza vaccine antibodies; Antibody titers will be measured by virus SN method and expressed as NT
7/ Influenza vaccine antibody NT titer ratio; Ratio of titers measured by virus SN method on Day 28/Day 0 for all participants and Day 56/Day 0 for participants receiving 2 injections
8/ Participants with influenza vaccine antibody NT titers above pre-defined thresholds ; Antibody titers will be measured by virus SN method
9/ Fold-increase in influenza vaccine antibody NT titer ; Antibody titers will be measured by virus SN method. Post/pre-injection ≥2 and ≥ 4 will be assessed |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
1/ Within 7 days after any injection
2 to 9/ Day 28 after each injection |
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E.5.2 | Secondary end point(s) |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | Yes |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | Yes |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | Yes |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 27 |
E.8.3 |
Will this trial be conducted at a single site globally?
| No |
E.8.4 | Will this trial be conducted at multiple sites globally? | Yes |
E.8.6 Trial involving sites outside the EEA |
E.8.6.2 | Trial being conducted completely outside of the EEA | Yes |
E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
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E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.2 | In all countries concerned by the trial months | 11 |