E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Prophylaxis of influenza infection caused by a pandemic influenza virus
(H5N1) |
|
E.1.1.1 | Medical condition in easily understood language |
Prevention of influenza infection caused by a pandemic influenza virus
(bird flu) |
|
E.1.1.2 | Therapeutic area | Diseases [C] - Virus Diseases [C02] |
MedDRA Classification |
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 assess safety: Frequency and severity of systemic reactions until 7
days after the first vaccination.
To assess immunogenicity: Rate of subjects with antibody response to
the vaccine strain associated with protection 21 days after the second
vaccination defined as titer measured by Microneutralization (MN) test
>= 1:20. |
|
E.2.2 | Secondary objectives of the trial |
To assess the safety and tolerability of a non-adjuvanted H5N1 influenza
vaccine in healthy infants, children and adolescents aged 6 months to 17
years;
Rate of subjects with antibody response 21 days after the first and
second vaccination ; Fold increase of antibody response 21 days after
the first and second vaccination as compared to baseline; Rate of
subjects with seroconversion 21 days after the first, second and booster
vaccination; Rate of subjects with antibody response associated with
protection 360 days after the first vaccination and 21 days after the
booster vaccination; Antibody response 360 days after the first
vaccination and 21 days after the booster vaccination; Fold increase of
antibody response 21 days after the booster vaccination as compared to
before the booster; |
|
E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Male and female subjects will be eligible for participation in this study if:
• They are 9 to 17ii years of age on the day of screening (for Stratum A
only);
• They are 3 to 8iii years of age on the day of screening (for Stratum B
onl
• They are 6 to 35iv months of age on the day of screening (for Stratum
C only);
• They were born at full term of pregnancy (≥ 37 weeks) with a birth
weight ≥ 2 kg (for Stratum C only);
• They and/or their parents/legal guardians understand the nature and
procedures of the study and agree to its provisions;
• Their parents/legal guardians provide written consent for participation
according to national law. In case the parents/legal guardians are
illiterate, the informed consent is also to be signed by an independent
witness;
• They provide written assent according to their age and capacity of
understanding;
• They are generally healthy, as determined by the investigator's clinical
judgment through collection of medical history and performance of a
physical examination;
• They are physically and mentally capable of participating in the study
and follow its procedures;
• They and/or their parents/legal guardians agree to keep a daily record
of symptoms for the duration of the study;
• If female of childbearing potential – have a negative urine pregnancy
test result within 24 hours prior to the scheduled first vaccination and
agree to employ adequate birth control measures for the duration of the
study.
ii From the 9th birthday to the last day before the 18th birthday
iii From the 3rd birthday to the last day before the 9th birthday
iv From 6 months of age to the last day before the 3rd birthday |
|
E.4 | Principal exclusion criteria |
Subjects will be excluded from participation in this study if:
• They have a history of exposure to H5N1 virus or a history of
vaccination with an H5N1 influenza vaccine;
• They are at high risk of contracting H5N1 influenza infection (e.g.
contact with poultry);
• They currently have or have a history of a significant neurological,
cardiovascular, pulmonary (including asthma), hepatic, metabolic,
rheumatic, autoimmune, hematological or renal disorderv;
• They have any inherited or acquired immunodeficiency;
• They have a disease or are currently undergoing a form of treatment or
were undergoing a form of treatment within 30 days prior to study entry
that can be expected to influence immune response. Such treatment
includes, but is not limited to, systemic or high dose inhaled
corticosteroids, radiation treatment or other immunosuppressive or
cytotoxic drugs;
• They have a history of severe allergic reactions or anaphylaxis;
• They have a rash, dermatological condition or tattoos which may
interfere with injection site reaction rating;
• They have received a blood transfusion or immunoglobulins or other
derivatives within 90 days prior to study entry;
• They have received any live vaccine within 4 weeks or inactivated
vaccine within 2 weeks prior to vaccination in this study;
• They have a functional or surgical asplenia;
• They have a known or suspected problem with alcohol or drug abuse;
• They were administered an investigational drug within 6 weeks prior
to study entry or are concurrently participating in a clinical study that
includes the administration of an investigational product;
• They are in a dependent relationship with the study site personnel.
Dependent relationships include close relatives (i.e., children, siblings);
• If female: are pregnant or lactating. |
|
E.5 End points |
E.5.1 | Primary end point(s) |
Safety:
• Frequency and severity of systemic reactions until 7 days after the first and second vaccination.
Immunogenicity:
• Rate of subjects with antibody response to the vaccine strain
associated with protection 21 days after the second vaccination defined
as titer measured by Microneutralization (MN) test ≥ 1:20. |
|
E.5.1.1 | Timepoint(s) of evaluation of this end point |
|
E.5.2 | Secondary end point(s) |
Safety:
• Frequency and severity of systemic reactions until 21 days after the
first, second and booster vaccination;
• Frequency and severity of injection site reactions until 21 days after
the first, second and booster vaccination;
• Rate of subjects with fever, malaise or shivering (in children and
adolescents aged 3 to 17 years) and fever and irritability (in infants and
young children aged 6 to 35 months) with onset within 7 days after the
first, second and booster vaccination;
• Frequency and severity of adverse events (AEs) observed during the
entire study period.
Immunogenicity:
• Rate of subjects with antibody response associated with protection 21
days after the first and second vaccination defined as Hemagglutination
Inhibition Antibody (HIA) titer
≥ 1:40 or Single Radial Hemolysis (SRH) area ≥25 mm2;
• Rate of subjects with antibody response associated with protection 21
days after the first vaccination defined as titer measured by MN test ≥
1:20;
• Antibody response 21 days after the first and second vaccination as
measured by MN, HI and SRH assay;
• Fold increase of antibody response 21 days after the first and second
vaccination as compared to baseline as measured by MN, HI and SRH
assay;
• Rate of subjects with seroconversion (defined as a minimum four fold
titer increase as compared to baseline [for MN and HI assay] or as either
a ≥ 25 mm2 hemolysis area after the vaccination in case of a negative
prevaccination sample [≤ 4 mm2] or a ≥50% increase in
hemolysis area if the pre-vaccination sample is > 4 mm2 [for SRH
assay]) 21 days after the first and second vaccination as measured by
MN, HI and SRH assay;
• Rate of subjects with antibody response associated with protection
360 days after the first vaccination and 21 days after the booster
vaccination as measured by MN, HI and SRH assay;
• Antibody response 360 days after the first vaccination and 21 days
after the booster vaccination as measured by MN, HI and SRH assay;
• Fold increase of antibody response 21 days after the booster
vaccination as compared to before the booster vaccination as measured
by MN, HI and SRH assay;
• Rate of subjects with seroconversion 21 days after the booster
vaccination as measured by MN, HI and SRH assay. |
|
E.5.2.1 | Timepoint(s) of evaluation of this end point |
|
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 | No |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | Yes |
E.6.13.1 | Other scope of the trial description |
|
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 | Yes |
E.7.1.3.1 | Other trial type description |
Phase I/II Study of a H5N1 vaccine |
|
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 | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | Yes |
E.8.1.7.1 | Other trial design description |
Partially blinded phase I/II clinical study |
|
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
randomized into dose groups |
|
E.8.2.4 | Number of treatment arms in the trial | 2 |
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 | No |
E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
|
E.8.7 | Trial has a data monitoring committee | Yes |
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
|
This study is terminated when the last subject completes day 381 (Visit 8).The study may be prematurely terminated if SAEs or other
significant vaccine related side effects occur. In addition the Sponsor
may stop the entire study for any medical reason at any time. |
|
E.8.9 Initial estimate of the duration of the trial |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 8 |
E.8.9.2 | In all countries concerned by the trial days | 0 |