Effectiveness Study of GSK Biologicals' Rotarix TM Vaccine in Hospitalized Children

Inclusion Criteria: For confirmed cases: * A male or female child born after 01 October 2006 and at least 14 weeks of age at the time of hospital admission. * Child admitted at the study hospital for SGE during the study period. * Onset of SGE ≤ 14 days prior to admission. * Written informed consent obtained and signed from the parent or guardian of the child. * Stool samples collected during the first 48 hours of hospitalisation and then tested positive for RV by PCR. For controls: * A male or female child born after 01 October 2006 and at least 14 weeks of age at the time of the hospital admission or visit to the hospital outpatient clinic. * Hospitalised or visiting the hospital outpatient clinic for non-GE causes at the same hospital during the same time-period, as the probable case. * Born within ±2 weeks from the date of birth of the case. If the list of children born within ±2 weeks is exhausted, then the range will be extended to ±4 weeks. In case a suitable control is not found even then, the range will be extended to ±6 weeks. * Written informed consent obtained and signed from the parent or guardian of the child. Exclusion Criteria: For cases: * Child has previously participated as a case or a control in this study, either in the same hospital or in another study hospital. * Onset of SGE \>48 hours after admission to the hospital (nosocomial infections). * Child with a condition where rotavirus vaccination would be contraindicated. For controls: * Child has participated in the past as a case or control in this study, either in the same hospital or in another study hospital. * Child who has symptoms of GE/ SGE during current hospital stay/ visit to the hospital outpatient clinic or on the day of interview of his/her parent or guardian. * Child with a condition where rotavirus vaccination would be contraindicated.