Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Phase II, Randomized, Double-blind, Vaccine-controlled Dose-escalating Study to Evaluate the Immunogenicity, Reactogenicity and Safety of Oral Live Attenuated Human Rotavirus (HRV) Vaccine (Rotavin-M1) in Healthy Infants in Vietnam
Brief Summary: The purpose of this study is to evaluate the safety and immunogenicity of Rotavin-M1 produced by the Center for Research and Production of Vaccines and Biologicals (POLYVAC) in infants in Vietnam. In addition, we evaluate different dosages and schedules to determine the best regimen to test in a clinical trial.


Options:
A: Inclusion Criteria:

1. Access to telephone at home or in the immediate neighborhood.
2. Healthy male and female non-malnourished (weight for length not ≤ -3 SD of WHO child growth standards) infants aged 6 weeks (till 6 weeks + 2 days).
3. Parent's permission to participate in the study is available.
4. No plans to travel over the next 4 months

Exclusion Criteria:

1. Gestational age \<37 weeks.
2. Any major physical congenital malformation.
3. Living in a household or has contact with an individual who is immunosuppressed.
4. Hospitalized once or more for the following illnesses since birth: heart disease, pneumonia, sepsis, meningitis, unconsciousness.
5. Is required to take daily medications other than vitamins or herbal "tonics".
6. Evidence of cardiovascular disease as indicated by any of the following:

   * Central cyanosis
   * Cyanotic or apnoeic spells
   * Features of congestive heart failure
   * Significant heart murmur detected on physical examination
7. Evidence of gastrointestinal disease indicated by following:

   * Diarrhea in the previous 7 days
   * Blood in the stools any time since birth
8. Evidence of neurological disease, as indicated by:

   * History of seizures any time since birth
   * History of unconsciousness
   * Focal deficit on physical examination
9. Evidence of liver or other reticuloendothelial disease, as indicated by any of the following:

   * Positive serology for hepatitis B surface antigen
   * Positive serology for hepatitis C antibody
   * SGOT or SGPT more than 1.25 times upper limit of normal (Upper limit normal SGOT 80 IU/L, SGPT 40 IU/L)
   * Alkaline phosphatase more than 1.25 times upper limit of normal (Upper limit of normal -470 IU/L)
   * Hepatomegaly (liver palpable 3 cm below costal margin), splenomegaly (palpable spleen), jaundice, or lymphadenopathy on physical examination
   * Serum bilirubin 1.25 times the upper limit of normal for age (Upper limit of normal 1.0 mg/dL).
10. Evidence of hematologic, rheumatologic, or immunologic disease, as indicated by any of the following:

    * Total leukocyte count \<3500 or \>15,000/mm3
    * Hemoglobin \<9 g/dL or \>17g/dL
    * Platelet count \<100,000/mm3
    * Any episode of sepsis, pneumonia or meningitis requiring hospitalization since birth.
11. Evidence of renal disease as indicated by any of the following:

    * Creatinine \>0.5 mg/dL
    * Hematuria (≥5 RBC/hpf)
    * Proteinuria (≥1+ per day)
B: Inclusion Criteria:

1. Healthy infants as established by medical history and clinical examination before entering the study.
2. Age: 6-8 weeks at the time of enrollment.
3. Parental ability and willingness to provide written informed consent.
4. Parent who intends to remain in the area with the child during the study period.
5. Receipt of birth dose of Hepatitis B vaccine and OPV.

Exclusion Criteria:

1. Presence of diarrhea or vomiting in the previous 72 hours or on the day of enrollment (temporary exclusion).
2. Presence of fever on the day of enrollment (temporary exclusion).
3. Acute disease at the time of enrollment (temporary exclusion).
4. Concurrent participation in another clinical trial at any point throughout the entire timeframe for this study.
5. Presence of significant malnutrition or any systemic disorder as determined by medical history and / or physical examination which would compromise the subject's health or is likely to result in nonconformance to the protocol.
6. History of congenital abdominal disorders, intussusception, or abdominal surgery.
7. Known or suspected impairment of immunological function based on medical history and physical examination.
8. Household contact with an immunosuppressed individual or pregnant woman.
9. Prior receipt or intent to receive rotavirus and / or diphtheria, tetanus, pertussis, Haemophilus Influenzae type b, Hepatitis B vaccine (other than birth dose) or inactivated polio vaccine (IPV) during the study period and outside of the study. OPV dose received during national / subnational immunization days will be allowed.
10. A known sensitivity or allergy to any components of the study vaccine.
11. Clinically detectable congenital or genetic defect.
12. History of persistent diarrhea (defined as diarrhea that lasts 14 days or longer).
13. Receipt of any immunoglobulin therapy and / or blood products since birth or planned administration during the study period.
14. History of chronic administration (defined as more than 14 days) of immunosuppressants including corticosteroids. Infants on inhaled or topical steroids may be permitted to participate in the study.
15. History of any neurologic disorders or seizures.
16. Any medical condition in the parents / infant which, in the judgment of the Investigator, would interfere with or serves as a contraindication to protocol adherence or a participant's parents' ability to give written informed consent.
C: Inclusion Criteria:

* Healthy infants, aged from 6 weeks through full 7 weeks,
* Consent form signed by at least one parent or by the legal representative properly informed about the study,
* Parent(s) / legal representative able to understand the protocol requirements and to fill in the Diary Card.

Exclusion Criteria:

* History of congenital abdominal disorders, congenital malformation of the gastrointestinal tract that could predispose to intussusception, or abdominal surgery,
* Congenital fructose intolerance, glucose-galactose malabsorption or sucrase-isomaltase insufficiency,
* Known or suspected impairment of immunological function,
* Known hypersensitivity to any component of RotaTeq® (e.g. sucrose) or of NeisVac-C® (including tetanus toxoid),
* Prior administration of any rotavirus vaccine,
* Prior administration of any vaccine within the 28 days prior to randomisation,
* Fever (rectal temperature ≥38.1°C) and/or acute diarrhoea and/or vomiting at randomisation,
* History of known prior rotavirus gastroenteritis, chronic diarrhoea, or failure to thrive,
* Any severe thrombocytopenia or any other coagulation disorder that would contraindicate intramuscular injection,
* Clinical evidence of active gastrointestinal illness,
* Receipt of intramuscular, oral, or intravenous corticosteroid treatment within the 14 days prior to randomisation. Note: Infants on inhaled and/or topical steroids may participate in the study,
* Infants residing in a household with an immunocompromised person,
* Prior receipt of a blood transfusion or blood products, including immunoglobulins.
D: Inclusion Criteria:

* At dose 1

  1. A healthy male or female, 6 to 12 weeks of age (42 days to 84 days of age).
  2. Full term gestation (\>=37 weeks).
  3. Birth weight of the subject should be \>=2.5 kg.
  4. Healthy subjects as established by medical history and clinical examination before entering into the study.
  5. Did not use any dose of Rota virus vaccine.
  6. Written informed consent obtained from the parent or guardian of the subject.
* At dose 2

  1. Received dose 1.
  2. Oral informed consent obtained from the parent or guardian of the subject for continuing participate the study.
* At dose 3

  1. Received both dose 1 and dose 2.
  2. Oral informed consent obtained from the parent or guardian of the subject for continuing participate the study.

Exclusion Criteria:

* At dose 1

  1. Has a chronic disease (cardiovascular, liver, kidney disease).
  2. Acute disease at the time of enrolment.
  3. Administering corticosteroids (\> 1mg/kg/day).
  4. Received any immunosuppressive therapy within 4 week before vaccination (Administration of immunoglobulins and/or any blood product or corticosteroids for \>2 weeks).
  5. Immunosuppressive or immunodeficient condition.
  6. Family has immunosuppressive or immunodeficient condition medical history.
  7. History of high fever convulsion.
  8. Allergic or reaction with any component of vaccine, includes anaphylactic shock with any antibiotic.
  9. Preterm of gestation delivery (gestation period \< 37 weeks).
  10. Low birth weight (\<2.5 kg).
  11. Fever (axillary temperature \>38oC) within 3 days before or on the day of vaccination.
  12. Malnutrition.
  13. Has any type of blood disorder, leukemia, or malignant tumor which can affect the bone marrow or lymph system.
  14. Use of any investigational or non-registered product (unlicensed drug or vaccine) other than the study vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period.
* At dose 2

  1. Acute disease at the time of 2nd dose.
  2. Administering corticosteroids (\> 1mg/kg/day).
  3. Received any immunosuppressive therapy within 4 week before vaccination (Administration of immunoglobulins and/or any blood product or corticosteroids for \>2 weeks).
  4. History of allergic disease or reactions likely to be exacerbated by any component of the study vaccine.
  5. Fever (axillary temperature \>38oC) within 3 days before or on the day of vaccination.
  6. Has any type of blood disorder, leukemia, or malignant tumor which can affect the bone marrow or lymph system.
  7. Use of any investigational or non-registered product (unlicensed drug or vaccine) other than the study vaccine during the study period.
* At dose 3

  1. Acute disease at the time of 3rd dose.
  2. Administering corticosteroids (\> 1mg/kg/day).
  3. Received any immunosuppressive therapy within 4 week before vaccination (Administration of immunoglobulins and/or any blood product or corticosteroids for \>2 weeks).
  4. History of allergic disease or reactions likely to be exacerbated by any component of the study vaccine.
  5. Fever (axillary temperature \>38oC) within 3 days before or on the day of vaccination.
  6. Has any type of blood disorder, leukemia, or malignant tumor which can affect the bone marrow or lymph system.
  7. Use of any investigational or non-registered product (unlicensed drug or vaccine) other than the study vaccine during the study period.

Answer: D