Rotavirus is one of the most common causes of diarrhea in young children. In 1999, a rotavirus vaccine was taken off the market because it was linked to an increased risk for intussusception, a type of bowel obstruction, in babies. Today, two different rotavirus vaccines called RotaTeq and Rotarix are available and very safe. Some studies suggest that they have a very small increased risk for intussusception, but that problem is rare. These vaccines have been shown to prevent the majority of cases of rotavirus infection and almost all of the severe cases. The vaccine is now on the regular immunization schedule to be given orally to infants as a liquid during standard vaccination visits — RotaTeq at ages 2 months, 4 months, and 6 months, and Rotarix at ages 2 months and 4 months. Your doctor will have the most current information.