What you need to know
- Norovirus is a very contagious infection that causes vomiting and diarrhea.
- The best way to help protect against norovirus is to wash your hands often with soap and warm water, since hand sanitizer may not be effective at killing the virus.
- If someone in your household has symptoms of norovirus, isolate them away from others, watch for signs of dehydration, and take steps to help prevent it from spreading.
If you feel like everyone is sick right now, you’re not alone. Levels of respiratory illnesses like COVID-19, flu, and RSV remain remain high in many states, and the U.S. is also battling a wave of norovirus, one of several viruses that cause a very contagious infection of the stomach and intestines.
Although norovirus infections are more common during the colder months—it’s also called the “winter vomiting disease”—the virus can spread at any time. Right now, however, cases have more than doubled since last year’s peak.
Read on to learn about the symptoms of norovirus, how it spreads, and what to do if someone in your household gets sick.
What are the symptoms of norovirus?
Norovirus is a very contagious infection that causes vomiting and diarrhea, which typically begins 12 to 48 hours after exposure to the virus. Additional symptoms may include stomach pain, body aches, headaches, and a fever. Norovirus typically resolves within three days, but people who are infected may still be contagious for up to two days after symptoms resolve.
Norovirus may cause dehydration, or a dangerous loss of fluids, especially in young children and older adults. See a health care provider if you or someone in your household shows signs of dehydration, which may include decreased urination, dizziness, a dry mouth and throat, sleepiness, and crying without tears.
How can you help protect against norovirus?
You can get norovirus if you have close contact with someone who is infected, touch a contaminated surface and then touch your mouth or nose, or consume contaminated food or beverages.
The best way to help protect yourself and others against norovirus is to wash your hands often with soap and warm water, since hand sanitizer may not be effective at killing the virus. Other ways to help protect yourself may include cooking food thoroughly and washing fruits and vegetables before eating them.
You can get sick with norovirus even if you’ve had it before, since there are many different strains.
How can families help protect against the spread of norovirus at home?
If someone in your household has symptoms of norovirus, isolate them away from others and watch for signs of dehydration. If you are sick with norovirus, do not prepare food for others in your household and use a separate bathroom, if possible.
When cleaning up after someone who has norovirus, wear rubber, latex, or nitrile gloves. Then wash your hands thoroughly.
Clean surfaces using a solution containing five to 25 tablespoons of bleach (that’s 12.5 fluid ounces, or just over ¾ cup), per gallon of water. Leave the bleach-water mix on surfaces for at least five minutes before wiping it off.
For more information, talk to your health care provider.
This article is supported by the Centers for Disease Control and Prevention of the U.S. Department of Health and Human Services (HHS) as part of a financial assistance award to the CDC Foundation totaling $69,392,486 with 100 percent funded by CDC/HHS. The contents are those of the author(s) and do not necessarily represent the official views of, nor an endorsement, by CDC/HHS, or the U.S. Government. In addition, the CDC Foundation does not guarantee and is not responsible for the accuracy or reliability of information or content contained in this article. Moreover, the CDC Foundation expressly disclaims all liability for damages of any kind arising out of use, reference to, or reliance on any information contained within this article. This article are not intended as, and should not be interpreted by you as, constituting or implying the CDC Foundation’s endorsement, sponsorship, or recommendation of the information, products, or services found therein.