Basics
Is norovirus contagious?
90-Second Answer
Last updated May 14, 2026
Short answer
Yes. Norovirus is highly contagious and can spread before, during, and after someone feels sick.
What it means
CDC says people with norovirus are most contagious while they are sick and during the first few days after they recover. The virus can still be found in stool for longer.
What to know
This is why staying home while sick, washing hands well, and avoiding food preparation for others for a period after symptoms stop can reduce spread.
When to check official guidance
Check CDC guidance, workplace rules, school policies, or local public health instructions during an outbreak.
Sources
Hantavirus Now summarizes external public health information in plain language. Source links open in a new tab.