A fast-moving stomach bug is spreading as the holiday season gets underway, according to new data from the Centers for Disease Control and Prevention.

Norovirus can be a nasty bug it inflames the stomach and intestines. Its the leading cause of vomiting, diarrhea, and foodborne illness in the U.S.

As of mid-November, nearly 14% of tests were coming back positive for norovirus. Thats more than double what we saw three months ago, when positivity was about 6%.

This data comes from the CDC, which collects reports from labs, hospitals and health departments across the country.

But its not just the CDC seeing this trend. Data from WastewaterSCAN shows norovirus is rising across the US, especially in states like Louisiana, Indiana and Michigan.

Is this expected? Yes. Norovirus usually peaks

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