Norovirus cases have been reported across the United States. The Centers for Disease Control and Prevention (CDC) said that of the tests that were conducted for norovirus, 28% of them have come back positive. According to reports, multiple norovirus outbreaks have been reported in Chicago. The CDC has defined a norovirus outbreak as "two or more similar illnesses resulting from a common exposure that is either suspected or laboratory-confirmed to be caused by norovirus." Norovirus is a high
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