how long are you contagious with the stomach?
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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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An Epstein-Barr virus is contagious during its long incubation period (four to seven weeks, see below) and then until symptoms are gone; however, there is evidence that some people may still spread the virus to others for many months even after symptoms are gone.
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So they may not know they have been infected, but they can still pass it to others. In fact, most people have been infected with EBV by the time they reach adulthood. People are definitely contagious while they have symptoms, which can last 2–4 weeks or even longer.
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Typical time it takes for symptoms to show up once you've caught the virus is one to four days. Adults can be contagious from the day before symptoms begin through five to 10 days after the illness starts. From: What Are Your Odds of Getting the Flu?
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For colds, most individuals become contagious about a day before cold symptoms develop and remain contagious for about five to seven days. Some children may pass the flu viruses for longer than seven days (occasionally for two weeks).
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Once a person is infected and sick, they can be contagious and spread the virus for about 7 to 10 days. The virus can be spread through close personal contact such as kissing, or sharing drinking cups, forks, or spoons. It can also spread through droplets in the air when an infected person coughs or sneezes.
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Ad14 is contagious and is transmitted person to person and by touching contaminated surfaces. The incubation period averages about five to eight days, but the contagious period can last for weeks to months. Risk factors include crowded living conditions, contact with an infected individual, and immunosuppression.
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People with norovirus are infectious for at least 3 days after the symptoms stop and on some occasions for up to 2 weeks.
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The incubation period may vary from about two to 12 weeks. A person may remain contagious for a long time (as long as viable TB bacteria are present in sputum) and can remain contagious until they have been on appropriate therapy for several weeks.
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Rotavirus. 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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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. The virus can be spread until symptoms disappear.
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How long are coxsackieviruses contagious? Coxsackieviruses are most contagious during the first week of symptoms. However, viable virus microbes have been found in respiratory tracts for up to three weeks and then in feces up to eight weeks after initial infection, but during this time, the viruses are less contagious.
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If you catch the flu, you're contagious for one to two days before you start to show symptoms and for five to seven days after becoming sick.
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People with the virus are likely contagious from the day or so before symptoms first appear until about five days after symptoms begin. Children and people with weakened immune systems may be contagious for a slightly longer time.
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Period of Contagiousness 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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You are most contagious while you still have blisters and mouth ulcers – which is usually for up to seven to 10 days. But you can continue to pass the virus in your faeces for several weeks, so you may still be mildly infectious during this time.
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The contagious period for an enterovirus infection starts about three days after infection and remains for about 10 days after symptoms develop; people can shed infectious viruses without having symptoms.