A Study to Estimate the Occurrence of Rotavirus Gastroenteritis in Children < 5 Years of Age, in Bulgaria and Latvia

• Number of RV GE cases among the acute gastroenteritis (AGE) cases reported at primary care settings in infants/children less than five years of age. [ Time Frame: At the time of enrollment of each subject (Day 0). ] [ Designated as safety issue: No ]
  

• Symptoms related to AGE and their measures, stratified by rotavirus status for all the AGE cases reported by infants/children less than five years of age at the primary care settings. [ Time Frame: Day 0 - Day 14+5 (At the time of phone call follow-up contact). ] [ Designated as safety issue: No ]
  
• Number of RV GE cases reported at each month by infants/children less than five years of age reported at the primary care settings. [ Time Frame: At the time of enrollment of each subject (Day 0). ] [ Designated as safety issue: No ]
  
• Number of hospitalisations for RV GE and AGE, reported at the primary care settings. [ Time Frame: At the time of phone call follow-up contact (14 to 19 days after enrollment). ] [ Designated as safety issue: No ]
  

A Primary care setting will include independent general practitioners (GP) (specialised in paediatrics) or independent paediatricians.

Stool samples will be collected from all enrolled subjects at Visit 1 (Day 0) and tested immediately after collection. The stool sample will be stored for 24 hours only, in case the test cannot be performed immediately after collection.