Norovirus cases are surging. A doctor explains what to look for

Norovirus cases are surging. A doctor explains what to look for  CNNNorovirus Outbreaks Are Rising Nationwide, C.D.C. Says  The New York TimesNorovirus: What to know about rising outbreaks of the gastrointestinal ailment  The Washington PostStomach flu outbreaks are increasing. How can you protect yourself from norovirus?  …
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