Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Phase III, Randomized, Double Blind, Placebo Controlled Trial to Evaluate the Protective Efficacy of Three Doses of Oral Rotavirus Vaccine (ORV) 116E, Against Severe Rotavirus Gastroenteritis in Infants
Brief Summary: The trial is a phase III randomized, double-blind, placebo-controlled trial with the primary objective of evaluating the efficacy of three doses of ORV 116E, 10\^5.0 FFU, against severe rotavirus gastroenteritis, in comparison with a placebo in India.


Options:
A: Inclusion Criteria:

* Subjects who the investigator believes that their parents/guardians can and will comply with the requirements of the protocol should be enrolled in the study.
* Healthy male or female infant between, and including, 6 and 14 weeks (42 - 104 days) of age at the time of first study vaccination in Portugal, France and Poland. A male or female infant between, and including, 6 and 12 weeks of age at the time of first study vaccination in Spain.
* Medically stable pre-term infants, born within a gestational period of 27 -36 weeks.
* Written informed consent obtained from the parent or guardian of the subject.
* Planned to be discharged from hospital's neonatal stay on or before the day of the first HRV vaccine/Placebo administration.

Exclusion Criteria:

* Use of any investigational or non-registered product (drug or vaccine) other than the HRV vaccine within 30 days preceding the first dose of HRV vaccine, 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 from birth till study end.
* 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).
* Any clinically significant history of chronic gastrointestinal disease.
* Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required).
* History of allergic disease or reactions likely to be exacerbated by any component of the vaccine.
* Major congenital defects or serious chronic illness (subjects with severe broncho-pulmonary dysplasia requiring persistent oxygen-therapy will be excluded).
* History of any neurologic disorders or seizures. Grade I and II intra-ventricular bleeding are allowed.
* Acute disease at the time of enrolment.
* Administration of immunoglobulins, and/or any blood products within one month (30 days) preceding the first dose of study vaccines or planned administration during the study period. Monoclonal anti-RSV therapy/prophylaxis and recombinant erythropoietin are allowed.
B: Inclusion Criteria:

* At least one parent(s) or legally acceptable representative's consent for participation and are able to understand study procedures
* Subjects aged 6 to 7 weeks at recruitment
* No plans to move in the next 24 months

Exclusion Criteria:

* Administration of rotavirus vaccine in the past
* Presence of any illness requiring hospital referral (temporary exclusion)
* Known case of immunodeficiency disease, known HIV positive
* Known case of chronic gastroenteritis disease
* Any other conditions which in the judgment of the investigator warrant exclusion (e.g. no exclusion criteria but seems "ill", investigators suspects neglect)
* Diarrhea on the day of enrollment (temporary exclusion)
C: Inclusion Criteria:

* Healthy infants of 6 weeks of age (±2 days).
* Study families reside within the Health and Demographic Surveillance System (HDSS) area, service area of the ICDDR,B.
* Family able to understand and comply with planned study procedures

Exclusion Criteria:

* Family residence outside the ICDDR,B HDSS service area, or families expecting to move away during the study period, will be excluded.
* A diagnosis or suspicion of immunodeficiency disorder (either in the infant or in a member of the immediate family).
* A diagnosis or suspicion of bleeding disorder that would contraindicate venipuncture.
* Acute diarrhea, infection or illness at the time of the first visit (6 weeks of age) that would require infant's admission to a hospital or would contraindicate provision of OPV per country guidelines.
* Acute vomiting and intolerance to liquids within 24 hours before the first visit (6 weeks of age).
* Receipt of OPV or IPV at any time before enrollment based upon mother's recall or immunization card if available.
* Because of contact transmission of vaccine poliovirus strains, newborns from multiple births will be excluded from the study to prevent transmission of vaccine strains received during routine immunization from the twin to the study participant.
D: Inclusion Criteria:

1. aged 6-8 weeks at the time of inclusion
2. able to swallow and no history of vomiting within 24 hours
3. resident in Madarounfa Health District and within the catchment area of the central health facility
4. intending to remain in the study area for 2 years
5. parent/guardian providing written informed consent

Exclusion Criteria:

Any of the following will exclude an infant from randomization in the study:

1. known history of congenital abdominal disorders, intussusception, or abdominal surgery
2. receipt of intramuscular, oral, or intravenous corticosteroid treatment within 2 wks
3. receipt or planned administration of a blood transfusion or blood products, including immunoglobulins
4. any known immunodeficiency condition
5. any serious medical condition
6. any other condition in which, in the judgment of the investigator, would interfere with or serves as a contraindication to protocol adherence or the parent/guardian's ability to give informed consent

Answer: B