Nelson Textbook of Pediatrics 22nd Edition | Viral gastroenteritis is a leading cause of childhood morbidity. Rotavirus is the most common cause of severe dehydrating diarrhea. Caliciviruses (norovirus, sapovirus) cause explosive outbreaks. Astroviruses cause mild-moderate watery diarrhea. Oral rehydration is mainstay; rotavirus vaccines have dramatically reduced burden.
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