how long is acute upper respiratory infection contagious?
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Adults may be infectious from the day before symptoms begin through approximately 5 days after the onset of illness. Children may shed virus for several days before their illness begins, and they may remain infectious for up to 10 days after symptom onset.
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Those first few days of a runny nose, coughing, and sneezing are when she's most likely to get others sick. But you'll still want to keep her away from friends for 4-5 days after that. In fact, she will be contagious as long as her cold symptoms last -- which could be up to 3 weeks.
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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, though sometimes people are contagious for as long as 10 days after symptoms appear. Children and people with weakened immune systems may be contagious for a slightly longer time.
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Upper respiratory infections are highly contagious and can be spread by close contact with an infected person or by coughing and sneezing. Healthy hand hygiene through regular handwashing with soap and warm water is one of the most effective ways to prevent infections and the spread of germs.
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With the viral type, children are contagious for as long as they have symptoms. But as with colds, they're most contagious during the peak of the illness, between days three and five. With bacterial pneumonia, contagiousness lasts from the first respiratory symptom until 48 hours after starting antibiotics.
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How long can I spread it? 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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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? SOURCE: Centers for Disease Control.
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People infected with norovirus are contagious from the moment they begin feeling ill to at least 3 days after recovery. Some people may be contagious for as long as 2 weeks after recovery.
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What is the contagious period for an enterovirus infection? In general, individuals are contagious about three days after exposure to the virus and remain contagious until about 10 days after they develop symptoms.
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How long will I be contagious due to bronchitis? It depends on the type of virus that you have. In most cases, you'll be contagious for a few days, and possibly as long as a week.
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Persons with acute hepatitis C virus infection are generally contagious from one or more weeks before the onset of symptoms. The contagious period is indefinite in chronically infected persons. All persons who test positive should be considered to be potentially contagious.
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Stomach flu caused by rotavirus is contagious during the incubation period (one to three days) that precedes symptoms. People infected with this virus continue to be contagious for up to two weeks after they've recovered.
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How long is someone infectious after they become infected? The contagious period is about 10 days. Does past infection with Mycoplasma pneumoniae make a person immune? Immunity after mycoplasma infection does occur.
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The majority of people with acute bronchitis are contagious if the cause is an infectious agent such as a virus or bacterium. The contagious period for both bacteria and viruses is usually as long as the patient has symptoms although for a few viruses, then maybe contagious a few days before symptoms appear.
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The virus can also be transmitted through contact with contaminated objects and surfaces. The incubation period is 4 to 6 days, and the virus is shed from 5 to 14 days after inoculation. The duration of contagiousness is unknown. Infected adults who are asymptomatic may be an underappreciated source of transmission.
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People infected with RSV are usually contagious for 3 to 8 days. However, some infants, and people with weakened immune systems, can continue to spread the virus even after they stop showing symptoms, for as long as 4 weeks.
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Infected people are most contagious up to about 2 weeks after the cough begins. Antibiotics may shorten the amount of time someone is contagious. While pertussis vaccines are the most effective tool to prevent this disease, no vaccine is 100% effective.