Please select the eligibility criteria that correspond to the clinical trial below.
Title: Immunogenicity and Safety of Multiple Formulations of an A/H1N1 Pandemic Vaccine in Healthy Subjects Aged 6 Months to 9 Years
Brief Summary: The purpose of the study is to evaluate different doses of the Influenza A/H1N1 pandemic vaccine in toddlers and children.

Primary Objectives:

* To describe the immunogenicity of the candidate vaccines after each injection.
* To describe the safety of the candidate vaccines after each injection.


Options:
A: Inclusion Criteria :

All subjects:

* Provision of Informed Consent Form signed by the subject's parent(s)/legal representative (and by an independent witness if required by local regulations). In addition, provision of Assent Form signed by subjects aged 7 to 9 years
* Subject and parent/guardian are able to attend all scheduled visits and to comply with all trial procedures

Subjects aged 3 to 9 years:

* Healthy children aged 3 to 9 years on the day of inclusion

Subjects aged 6 to 35 months:

* Healthy infants and toddlers aged 6 to 35 months on the day of inclusion
* Born at full term of pregnancy (≥ 37 weeks) and with a birth weight ≥ 2.5 kg

Exclusion Criteria :

* Participation in another clinical trial investigating a vaccine, drug, medical device, or a medical procedure in the 4 weeks preceding the first trial vaccination
* Planned participation in another clinical trial during the present trial period
* Receipt of any vaccine in the 4 weeks preceding the trial vaccination
* Planned receipt of any vaccine prior to the Day 42 blood sample
* Receipt of blood or blood-derived products in the past 3 months which might interfere with the assessment of immune response
* Known or suspected congenital or acquired immunodeficiency, 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)
* Self-reported seropositivity for Human Immunodeficiency Virus (HIV), Hepatitis B surface antigen, or Hepatitis C
* Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccine(s) used in the trial or to a vaccine containing any of the same substances
* Self reported thrombocytopenia contraindicating intramuscular (IM) vaccination
* Bleeding disorder or receipt of anticoagulants in the 3 weeks preceding inclusion contraindicating IM vaccination
* Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily
* Chronic illness that in the opinion of the investigator, is at a stage where it might interfere with trial conduct or completion
* Employees of the investigator or study center, with direct involvement in the proposed study or other studies under the direction of that investigator or study center, as well as family members of the employees or the investigator.
* Any confirmed case of influenza (including swine-origin A/H1N1 Influenza) since March 2009
* Personal or family history of Guillain-Barré syndrome
* Active neoplastic disease or a history of any hematologic malignancy
* Known seizure/epilepsy history and/or taking anti-seizure medication
* Receipt of psychiatric drugs. Subjects receiving a single antidepressant drug and stable for at least 3 months prior to enrollment, without decompensating symptoms will be allowed to enroll in the study
* Febrile illness (temperature ≥ 100.4°F \[≥ 38.0°C\]) or moderate or severe acute illness/infection (according to investigator judgment) on the day of vaccination
B: Inclusion Criteria:

* All vaccinees must be Hong Kong residents aged between 6 and 17.

Exclusion Criteria:

* Vaccinees should not be allergic or hypersensitive to the active substances or components (eggs, chicken proteins, formaldehyde, neomycin, etc.) used in the vaccines or where vaccination is otherwise contraindicated. Subjects should not have an underlying immunocompromised condition or be receiving immunosuppressive agents.
C: Group A:

Inclusion Criteria:

* Hutterites other than the healthy children who will be immunized. Although this category as a whole will be used to assess indirect benefit of the vaccine in the main analysis, Hutterites at high risk for influenza complications within this category will be assessed in a separate analysis. These are defined as anyone in one or more of the following groups:
* individuals aged ≥ 65 years
* children 23 months of age or less
* anyone with ≥ 1 of the following conditions severe enough to require regular medical follow-up or hospital care:

  * chronic cardiac or pulmonary disorders (including bronchopulmonary dysplasia, cystic fibrosis, and asthma)
  * diabetes mellitus and other metabolic diseases
  * cancer
  * immunodeficiency
  * immunosuppression (due to underlying disease and/or therapy)
  * renal disease
  * anemia
  * hemoglobinopathy
  * any condition that can compromise respiratory function or the handling of respiratory secretions or that can increase the risk of aspiration.

Exclusion Criteria:

* There are no exclusion criteria for this category of participants.

Group B:

Inclusion Criteria:

* Healthy children aged 36 months to 15 years who will be immunized as part of the intervention.

Exclusion Criteria:

* Anaphylactic reaction to a previous dose of influenza vaccine
* Anaphylactic reaction to hepatitis A vaccine
* Anaphylactic reaction to neomycin
* Known IgE-mediated hypersensitivity to eggs manifested as hives
* Swelling of the mouth and throat, difficulty in breathing, hypotension, or shock
* Guillain-Barré syndrome within eight weeks of a previous influenza vaccine.
D: Inclusion Criteria: (First Season)

* who is aged at least 6 months and less than 36 months of age at the time of enrollment;
* who is in good health as determined by medical history, physical examination and clinical judgement;
* whose parent(s)/legal guardian(s) have provided written informed consent after the nature of the study has been explained;
* who, along with their parent(s)/legal guardian(s), will be available until the completion of the first season's surveillance phase;
* whose parent(s)/legal guardian(s), can be reached by study staff for the post-vaccination contacts \[telephone, clinic or home visit\].

(Second Season)

* who was enrolled into the first season of the trial and received at least one vaccination in the primary series;
* who completed the safety and efficacy evaluations during the first season surveillance phase;
* who is in good health as determined by medical history, physical examination and clinical judgement;
* whose parent(s)/legal guardian(s) have provided written informed consent for the second season of the trial after the nature of the study has been explained;
* who, along with their parent(s)/legal guardian(s), will be available until the completion of the second season's surveillance phase;
* whose parent(s)/legal guardian(s), can be reached by study staff for the post-vaccination contacts \[telephone, clinic or home visit\].

Exclusion Criteria: (First Season)

* whose parent(s)/legal guardian(s) are perceived to be unavailable or difficult to contact for evaluation or study visits during the study period;
* with any serious chronic disease (e.g., with signs of cardiac or renal failure or severe malnutrition), including progressive neurological disease;
* with Down's syndrome or other known cytogenetic disorders;
* with a known or suspected disease of the immune system or those receiving immunosuppressive therapy, including systemic corticosteroids;
* who received any blood products, including immunoglobulin, in the period from six months prior to vaccination through to the conclusion of the study;
* for whom there is intent to administer any other investigational vaccine or agent from one month prior to enrollment through to the conclusion of the study;
* have an immunosuppressed or an immunocompromised individual living in the same household;
* who, at any time prior to entry into this study, received a dose of any influenza vaccine (commercial or investigational);
* who, in the two weeks prior to entry into this study, received a dose of any influenza treatment (commercial or investigational);
* with a documented history of hypersensitivity to egg or egg protein or any other component of the assigned study vaccine;
* with a clinically confirmed respiratory illness with wheezing within two weeks prior to enrollment;
* who received aspirin (acetylsalicylic acid) or aspirin-containing products in the two weeks prior to enrollment or for which use is anticipated during the study;
* who were administered any live virus vaccine within one month prior to enrollment or expected to receive another live virus vaccine within one month of vaccination in this study;
* with any medical conditions that in the opinion of the investigator might interfere with interpretation of the study results.

If any of these criteria are met following enrolment, the subject will be excluded from subsequent vaccine dosing.

Note: Pregnancy in a household member or any person who has regular contact with the subject is not a contraindication to the enrollment or ongoing participation of the subject in the study.

(Second Season)

* whose parent(s)/legal guardian(s) are perceived to be unavailable or difficult to contact for evaluation or study visits during the study period;
* with any serious chronic disease (e.g., with signs of cardiac or renal failure or severe malnutrition), including progressive neurological disease;
* with Down's syndrome or other known cytogenetic disorders;
* with a known or suspected disease of the immune system or those receiving immunosuppressive therapy, including systemic corticosteroid of a dose equivalent to 2 mg/kg/day or greater of prednisolone or equivalent to a total of 20 mg/day or greater for children who weigh more than 10 kg, for more than 14 days duration until 2 weeks after corticosteroids have been discontinued;
* who received any blood products, including immunoglobulin, in the period from six months prior to the second season vaccination through to the conclusion of the study;
* for whom there is intent to administer any other investigational vaccine or agent from one month prior to the second season vaccination through to the conclusion of the study;
* have an immunosuppressed or an immunocompromised individual living in the same household;
* who, at any time prior to entry into this study, received a dose of any influenza vaccine (commercial or investigational) with the exception of the primary series of study vaccine (CAIV-T/placebo);
* who, in the two weeks prior to receiving the second season vaccination, received a dose of any influenza treatment (commercial or investigational);
* with a documented history of hypersensitivity to egg or egg protein or any other component of the assigned study vaccine (CAIV-T/placebo);
* with a clinically confirmed respiratory illness with wheezing within two weeks prior to receiving the second season vaccination;
* who received aspirin (acetylsalicylic acid) or aspirin-containing products in the two weeks prior to receiving the second season vaccination or for which use is anticipated during the study;
* who were administered any live virus vaccine within one month prior to receiving the second season vaccination or expected to receive another live virus vaccine within one month of receiving the second season vaccination;
* with any medical conditions that in the opinion of the investigator might interfere with interpretation of the study results.

Note: Pregnancy in a household member or any person who has regular contact with the subject is not a contraindication to the enrollment or ongoing participation of the subject in the study.

Answer: A