
Merck's Rotateq, an oral, live, pentavalent vaccine, has received FDA approval for the prevention of rotavirus gastroenteritis in infants, an illness that causes vomiting, watery diarrhea, fever, and abdominal pain and results in 55,000 hospitalizations annually. Clinical studies of the vaccine included more than 72,000 healthy infants and closely examined the risk of intussusception, a serious life-threatening condition in which the intestines become twisted.



