Basics
How does norovirus spread?
90-Second Answer
Last updated June 28, 2026
Short answer
Norovirus spreads through tiny particles from vomit or stool, contaminated food or water, contaminated surfaces, and close contact with someone who is sick.
What it means
CDC says people can get norovirus by eating or drinking contaminated items, touching contaminated surfaces and then touching their mouth, or having direct contact with an infected person.
What to know
The main idea is contamination. Good handwashing, careful food handling, and cleaning contaminated surfaces matter because norovirus can spread through very small amounts of virus.
When to check official guidance
Use CDC prevention guidance during household illness, food service concerns, school outbreaks, cruise travel, or other shared settings.
Sources
Hantavirus Now summarizes external public health information in plain language. Source links open in a new tab.