Geographic
Is norovirus seasonal?
90-Second Answer
Last updated June 28, 2026
Short answer
Norovirus can happen any time of year, but activity is often higher during colder months.
What it means
CDC describes norovirus as sometimes called the winter vomiting disease because outbreaks are more common in late fall, winter, and early spring.
What to know
Seasonal patterns do not remove risk at other times. Travel, gatherings, and shared settings can still matter.
When to check official guidance
Check CDC and local public health updates during outbreak periods or before travel.
Sources
Hantavirus Now summarizes external public health information in plain language. Source links open in a new tab.