The rotavirus vaccine is designed to protect against rotavirus, a virus that causes severe diarrhea, vomiting, and dehydration in infants and young children. It is typically given in two or three doses, starting at around 2 months of age. The vaccine helps the body build immunity to the virus, significantly reducing the risk of severe illness. Vaccination against rotavirus is important because the virus is a leading cause of gastroenteritis in children worldwide. By receiving the rotavirus vaccine, children are less likely to require hospitalization and can avoid the complications associated with severe dehydration.