how contagious is the stomach flu?
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Norovirus. With norovirus — the most common cause of viral gastroenteritis in adults — you're contagious when you begin to feel ill. Symptoms usually appear within one to two days of exposure. Although you typically feel better after a day or two, you're contagious for a few days after you recover.
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Influenza. Many people talk about the “stomach flu” when they're feeling sick to their stomachs. It isn't the same as influenza or the flu. Stomach flu is an illness called gastroenteritis, which is usually caused by a virus.
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Symptoms of rotavirus — the leading cause of viral gastroenteritis in infants and young children — usually appear one to three days after exposure. But you're contagious even before you develop symptoms, and up to two weeks after you've recovered.
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Symptoms of the stomach flu In fact, the stomach flu usually looks a lot worse than it is. Your baby or child may have cycles of vomiting and diarrhea for about 24 hours. If your child has the stomach flu, they may have hard-to-miss signs and symptoms like: diarrhea (usually watery and sometimes explosive)
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A person with gastroenteritis is most infectious from when their symptoms start until 48 hours after all their symptoms have passed, although they may also be infectious for a short time before and after this.
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About a week. Typically, you're contagious from 1 day before you have any symptoms. You stay that way for 5 to 7 days after you start feeling sick.
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With norovirus — the most common cause of viral gastroenteritis in adults — you're contagious when you begin to feel ill. Symptoms usually appear within one to two days of exposure.
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Stomach flu (viral enteritis) is an infection in the intestines. It has an incubation period of 1 to 3 days, during which no symptoms occur. Once symptoms appear, they usually last for 1 to 2 days, although symptoms may linger for as long as 10 days.
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It has an incubation period of about 12 - 48 hours, and can cause the person to be contagious during the incubation period and for as long as they shed virus (usually about three days after symptoms stop but sometimes up to two weeks).
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People with flu are most contagious in the first 3-4 days after their illness begins. Some otherwise healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick.
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When You Are Contagious 4﻿ General recommendations are that you can return to daily activities once you have been symptom-free for 24 hours, but you are actually still contagious for three days after you recover and could spread the virus for up to 2 weeks.
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Some of the contagious causes of gastroenteritis (most notably, Norovirus) can be spread by kissing and other close personal contact or on surfaces where droplets containing viruses or other agents survive.
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Actually many different types of viruses can cause gastroenteritis, the most common are noroviruses and rotaviruses. Because they are not caused by influenza, the seasonal flu shot will not protect you from the “stomach flu.” Unfortunately, there isn't currently a vaccine for the viruses that cause “stomach flu.”
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They're not contagious. If you're really coughing and sneezing or you feel generally miserable, stay home. Also, avoid the office if you're vomiting or have diarrhea. Get plenty of rest, drink lots of fluids, and wait for your symptoms to subside.
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Hepatitis A is very contagious. It is spread when someone unknowingly ingests the virus — even in microscopic amounts — through close personal contact with an infected person or through eating contaminated food or drink.
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If you have the flu, you'll be contagious one day before developing symptoms and up to five to seven days after becoming ill. Younger children or people with a weakened immune system may be contagious for longer. The influenza virus can also survive on surfaces, such as doorknobs and tables, for up to 24 hours.
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An infected person can spread the flu for five to seven days after becoming infected. The infectious period can begin 24 hours before the onset of symptoms. This means you can spread the flu without even knowing you're sick.