Effectiveness of RotarixTM Vaccine in Children Aged Between 12 Weeks to < 5 Years, Hospitalised for Severe Gastroenteritis

Inclusion Criteria:

For SGE subjects:

• A male or female child aged 12 weeks to < 5 years at the time of hospital admission/ ED stay. The subject becomes ineligible on the fifth birthday.
• Subject admitted to (or who will have an ED stay at) the study hospital(s) for SGE during the study period.
• Onset of SGE ≤ 14 days prior to admission/ ED stay.
• Written/thumb printed informed consent obtained from the parent(s)/legally acceptable representative(s) (LAR (s)) of the subject.

For Cases:

• Laboratory confirmed (i.e. by ELISA) RV-positive stool sample collected at hospital admission/ ED stay or during the first 48 hours of hospitalisation.

For Controls:

• Subject admitted to (or who will have an ED stay at) the same study hospital(s) for SGE as that of the case during the study period.
• Laboratory confirmed (i.e. by ELISA) RV-negative stool sample collected at hospital admission/ ED stay or during the first 48 hours of hospitalisation.
• Subjects born within ± 2 weeks from the date of birth of the case.

Exclusion Criteria:

For SGE subjects:

• Child in care.
• Hospitalisation is unrelated to GE.
• Onset of SGE > 48 hours after admission to (or ED stay at) the hospital.
• Subject has digestive tube anomalies, chronic gastrointestinal disease or uncorrected congenital abnormalities.
• Subject with immunodeficiency.
• Subjects who live out of the federative entity where hospital(s) are located.

For Controls:

• Subject has previously participated as case in this study.