Rotavirus infection or rotavirus is an infectious disease affecting the mucous membranes of the oropharynx and small intestine. This is mainly a disease of children aged six months to 4-5 years. But adults can also get sick. The disease usually proceeds in a mild form with erased symptoms. The incubation period lasts an average of 2-3 days.

Rotavirus infection is characterized by an acute onset: a sharp increase in body temperature, nausea, pain and rumbling in the stomach, and intense diarrhoea of bright yellow colour. Rotavirus infection is often mistaken for Acute respiratory infection (ARI) because of a runny nose and sore throat symptoms.