While rotavirus infection can occur in adults, it often causes no symptoms or mild signs. It is most common in those caring for a sick child. If you are a new or expecting parent, vaccinate your child against rotavirus as part of the routine childhood immunizations to reduce your risk of infection.While rotavirus infection can occur in adults, it often causes no symptoms or mild signs. It is most common in those caring for a sick child. If you are a new or expecting parent, vaccinate your child against rotavirus as part of the routine childhood immunizations to reduce your risk of infection.