How fast do norovirus symptoms come on

Other symptoms include:. Symptoms of dehydration include: decrease in urination dry mouth and throat feeling dizzy when standing up. Related Links. Links with this icon indicate that you are leaving the CDC website. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.

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Cancel Continue. If you're planning to eat at a restaurant during a holiday trip, here's what health and travel experts say you should consider first, and how to….

Traveling on different modes of transportation with others can come with varying degrees of risk during the pandemic. Here's what to know. Health Conditions Discover Plan Connect. How Long Does the Norovirus Last? Medically reviewed by Jill Seladi-Schulman, Ph. How long do symptoms of norovirus last? How long are you contagious? How long does the norovirus remain active on surfaces? When to see a doctor. Key takeaways. Read this next. Medically reviewed by Saurabh Sethi, M. Medically reviewed by Deborah Weatherspoon, Ph.

Symptoms usually begin 1 or 2 days after ingesting the virus, but may appear as early as 12 hours after exposure. The illness typically comes on suddenly. The infected person may feel very sick and vomit often, sometimes without warning, many times a day. Sometimes people infected with norovirus have no symptoms at all, but can still pass the virus to others. Most people recover in 1 or 2 days and have no long-term health effects. Dehydration can be a concern in the very young, the elderly, or people with weakened immune systems.

Occasionally infected people may experience milder symptoms for a week or more. Noroviruses are very contagious. They are found in the stool feces or vomit of infected people. From there, noroviruses are transferred to food, water, or surfaces by the hands of infected people who have not washed adequately after using the bathroom. Complete this free online training and the Minnesota Department of Health will provide certification that your venue has learned about these issues.

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