Children have little energy reserve and become energy depleted quickly. The early reintroduction of a normal diet when tolerated is recommended. Antidiarrhoeal agents are usually not necessary. Drugs which inhibit the muscular action of the bowel may be dangerous. Drugs such as diphenoxylate-atropine, may be fatal in young children.
Good hygiene reduces the spread of infective agents.
There is no specific antiviral drug and viruses may be contracted more than once as previous infection does not completely protect against future infection with the same virus. Dr Bill's - Home Page.