Norovirus cases are on the rise this winter. According to the CDC, there were a record 91 norovirus outbreaks reported by state health officials the week of December 5, 2024 (the most recent report)—the highest of the year.

Reported cases of norovirus — a brief, but miserable illness — have generally been rising across the country in recent months, according to national data, but people can help protect themselves by practicing good hygiene.