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Share sensitive information only on official, secure websites. Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. Always wash your hands and handle food well. Skip directly to site content Skip directly to search. An official website of the United States government.

Official websites use. About Norovirus. How to Prevent Norovirus.

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How Norovirus Spreads. Learn how you can easily get norovirus and the different ways it spreads. Communications Resources. Download and share norovirus prevention resources and graphics for different channels.

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Norovirus Facts and Stats. Learn about norovirus in the United States and globally, disease impact, and data trends. Laboratory Testing for Norovirus. Learn about lab testing and diagnostic methods for norovirus. Compare differences across the CDC systems used for reporting norovirus outbreaks. Norovirus Specimen Collection.

Learn about where norovirus can be detected and how to collect specimens for testing. Norovirus Reporting and Surveillance. Identify surveillance and reporting systems for norovirus and different roles in reporting.

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Norovirus Outbreaks. Learn about current norovirus outbreaks and alert and common settings where outbreaks occur. Learn More. Norovirus Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. View All. Sign up for Email Updates.