What to know about norovirus as cases surge across U.S.

New data programs instances of norovirus are climbing in the U.S. According to the CDC, state health and wellness divisions reported 91 cases during the week of Dec. 5, which is practically three times greater than the typical once a week high of instances reported in between 2021 and 2024. CBS News clinical contributor Dr. Celine Gounder discusses what to recognize.

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