Norovirus is the most common infectious cause of diarrhea and vomiting. It is a highly contagious viral infection that often causes outbreaks. People can be exposed to the virus directly by contact with an infected person, or indirectly via food or surfaces contaminated by the stool or vomit of an infected person. Airborne virus particles produced by vomiting can also transmit the virus. Because norovirus is so contagious, it is very easy to spread the virus at home, at work, at school, and in public places. It is very easily transmitted in situations where people live closely with each other, such as nursing homes or cruise ships. Handwashing is the most important thing you can do to protect yourself and prevent the spread of norovirus.

The documents and websites below may answer more of your questions about norovirus and how to protect yourself.    

Information for the Public
Information for Health Facilities and Health Professionals


Additional Resources

For more information, contact the Epidemiology Unit at 619-692-8499 or send us an e-mail.