Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Placebo-controlled Study to Evaluate the Immunogenicity, Reactogenicity and Safety of Two Doses of GSK Biologicals' Oral Live Attenuated Human Rotavirus (HRV) Liquid Vaccine, When Given to Healthy Infants, in Vietnam
Brief Summary: To provide specific data on immunogenicity of GSK Biologicals' HRV liquid vaccine, when co-administered with the routine Expanded Program of Immunization (EPI) in Vietnam. The study will also assess reactogenicity and safety of the HRV liquid vaccine relative to the placebo


Options:
A: Inclusion criteria:

* Healthy infants 6-13 weeks of age at the time of the first study vaccination whose parent/guardian sign a written informed consent and whose parents/guardians can and will comply with the requirements of the protocol (e.g., completion of the diary cards, return for follow-up visits)

Exclusion criteria:

* Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) within 30 days preceding the first dose of study vaccine or placebo, or planned use during the study period
* Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs since birth. (Topical steroids are allowed.)
* Child is unlikely to remain in the study area for the duration of the study
* Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection
* History of allergic disease or reaction likely to be exacerbated by any component of the vaccine
* Administration of immunoglobulins and/or blood products since birth or planned administration during the study period
* Any clinically significant history of chronic gastrointestinal disease including any uncorrected congenital malformation of the gastrointestinal tract or other serious medical condition as determined by the investigator
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 informed consent.
4. Parent who intends to remain in the area with the child during the study period.

Exclusion Criteria:

1. Presence of diarrhea or vomiting in the previous 72 hours or on the day of enrollment.
2. Acute disease at the time of enrollment (temporary exclusion)
3. Concurrent participation in another clinical trial at any point throughout the entire time frame for this study
4. History of congenital abdominal disorders, intussusception, or abdominal surgery.
5. Known or suspected impairment of immunological function based on medical history and physical examination.
6. History of any neurologic disorders or seizures.
7. 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 informed consent.
C: Inclusion Criteria:

* Healthy male or female infant between, and including, 6 and 10 weeks of age with a birth weight of \> 2000 grams.
* Written informed consent obtained from the parent or guardian of the subject.

Exclusion Criteria:

* Use of any investigational or non-registered product (drug or vaccine) other than the HRV liquid vaccine or placebo within 30 days preceding the first dose of HRV liquid vaccine or placebo, or planned use during the study period.
* Chronic administration of immunosuppressants or other immune-modifying drugs since birth.
* Planned administration/ administration of a vaccines not foreseen by the study protocol except for DTPw, HBV and OPV vaccines within 14 days before each dose of HRV liquid vaccine or placebo and ending 14 days after.
* Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational product (pharmaceutical product or device).
* History of allergic disease or reactions likely to be exacerbated by any component of the HRV liquid vaccine or placebo.
D: Inclusion Criteria:

* Between 42 and 55 days of age at the time of enrollment.
* Healthy infant free of chronic or serious medical condition as determined by history and physical examination at the time of study enrollment.
* Parents/guardians of each subject are able to understand and follow study procedures and agree to participate in the study by providing parental/guardian permission.

Exclusion Criteria:

* If child has previously had intussusception or abdominal surgery.
* Use of any immunosuppressive drugs or immunoglobulin and/or blood product use since birth or anticipated during study period.
* Current enrollment in any other intervention trial or use of any investigational drug or vaccine throughout the study period.
* Birthweight less than 2000 grams or gestation \< 36 weeks, if this information is available.
* Any subject who reports plan to leave the study area before the completion of the study (i.e., relocation, migration, etc.).
* Another child living in the same compound is already enrolled in the trial (i.e., only one participant can be enrolled per compound).
* After the rotavirus vaccine is introduced into the routine EPI system in Navrongo: Another child in the compound is less than 16 weeks of age.
* The child has received rotavirus vaccine outside of this study.

Answer: C