Most infectious organisms are transmitted by unwashed hands. The best way to prevent viral gastroenteritis is to handle food properly and wash hands thoroughly after using the toilet.
RotaTeq is a vaccine used to prevent rotavirus-related gastroenteritis in infants. However, a serious intestinal problem called intussusception has been reported in a small number of infants who received this vaccine. Immediately call your doctor if your child received this vaccine and has stomach pain, vomiting, diarrhea, blood in the stool, or a change in bowel movements.
US Food and Drug Administration. FDA Approves New Vaccine to Prevent Rotavirus Gastroenteritis in Infants, Rockville, MD: National Press Office; February 3, 2006. Press Release P06-16.
Dennehy PH. Acute diarrheal disease in children: epidemiology, prevention, and treatment. Infect Dis Clin North Am. 2005; 19(3): 585-602.
Jabbar A. Gastroenteritis and antibiotic-associated diarrhea. Prim Care. 2003; 30(1): 63-80, vi.