Rotavirus is a virus that spreads easily among infants and young children which can cause severe watery diarrhea, vomiting, fever, and abdominal pain.

Frequency of shots:
ORAL ADMINISTRATION. The first dose of either vaccine should be given before a child is 15 weeks of age. Children should receive all doses of rotavirus vaccine before they turn 8 months old.

Who can use this:
- Children who have not been given this vaccine before 15 weeks of age.

Who cannot use this:
- A severe (life-threatening) allergic reaction to a previous dose of rotavirus vaccine,
- A severe (life threatening) allergy to any component of rotavirus vaccine,
- Severe combined immunodeficiency (SCID), or
- A previous episode of intussusception.
- Babies who are moderately or severely ill should wait until they recover. This includes babies with moderate or severe diarrhea or vomiting.