Noroviruses spread easily, causing more than 20 million gastroenteritis cases each year in the U.S. There’s no vaccine to prevent norovirus infection and no drug to treat it.

Noroviruses are a group of related viruses. Infection with these viruses affects the stomach and intestines and causes an illness called gastroenteritis (GAS-tro-en-ter-I-tis; inflammation of the stomach and intestines).

Anyone Can Get Norovirus

Anyone can be infected with noroviruses and get sick. Also, you can get norovirus illness more than once during your life. The illness often begins suddenly. You may feel very sick, with stomach cramping, throwing up, or diarrhea.

The viruses are found in the vomit and stool of infected people. You can get it by

• Eating food or drinking liquids that are contaminated with norovirus (someone gets stool or vomit on their hands, then touches food or drink).
• Touching surfaces or objects contaminated with norovirus and then putting your hand or fingers in your mouth.
• Having direct contact with a person who is infected with norovirus (for example, when caring for someone with norovirus or sharing foods or eating utensils with them).

People with norovirus illness are contagious from the moment they begin feeling sick until at least 3 days after they recover. But, some people may be contagious for even longer.

Practice proper hand hygiene

WASH YOUR HANDS…carefully with soap and water, especially after using the toilet and changing diapers and always before eating or preparing food.  If soap and water aren’t available, use an alcohol-based hand sanitizer.  These alcohol-based products can quickly reduce the number of germs on hands in some situations, but they are not a substitute for washing with soap and water.

Take care in the kitchen

Carefully wash fruits and vegetables, and cook oysters and other shellfish thoroughly before eating them.

Do not prepare food while infected

People with norovirus illness should not prepare food for others while they have symptoms and for 3 days after they recover from their illness.

Clean and disinfect contaminated surfaces

After throwing up or having diarrhea, immediately clean and disinfect contaminated surfaces by using a bleach-based household cleaner as directed on the product label. If no such cleaning product is available, you can use a solution made with 5 tablespoons to 1.5 cups of household bleach per 1 gallon of water.

Wash laundry thoroughly

Immediately remove and wash clothing or linens that may be contaminated with vomit or stool.   Handle soiled items carefully—without agitating them—to avoid spreading virus.  If available, wear rubber or disposable gloves while handling soiled clothing or linens and wash your hands after handling.  The items should be washed with detergent at the maximum available cycle length and then machine dried.

For more information see www.cdc.gov