Knowledge is key: Norwalk viruses are found in vomit and stool. You can get it by eating/drinking contaminated products, touching contaminated things, having direct contact with a person who is infected. People are contagious from when they begin feeling sick until at least 3 days after they are better. Wash hands often, avoid food prepared by someone infected and clean contaminated surfaces often.
Answered 4/9/2013
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