how long is a respiratory infection contagious for?
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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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The contagious period for the flu begins about 1 day before symptoms start and can last as long as 5-7 days from when you first felt sick. You're generally contagious with a cold 1-2 days before your symptoms start, and you could be contagious as long as your symptoms are present—in rare cases, up to 2 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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These droplets contaminate the mouth or breathing tract of another individual to eventually infect their lungs. The approximate time when pneumonia becomes contagious varies with the type of infecting agent and may range from one to two days to weeks.
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You're generally contagious with a cold 1-2 days before your symptoms start, and you could be contagious as long as your symptoms are present—in rare cases, up to 2 weeks.
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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. Because of that, be careful letting her around babies and very young kids. The virus that caused her cold could make an infant severely ill.
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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.
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Pittman notes individuals with the flu can be contagious for up to three weeks after the onset of symptoms. “In many cases, just because you or your children are fever free and can return to work or school does not mean you are no longer contagious.
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How long are you contagious if you have acute bronchitis? If you have begun taking antibiotics for bronchitis, you usually stop being contagious 24 hours after starting the medication. If you have a viral form of bronchitis, antibiotics will not work.
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As harsh as the flu can be, the good news is that most people feel much better within one to two weeks. Most healthy adults become contagious the day before symptoms develop (which makes it trickier to prevent from spreading). They remain infectious for up to five to seven days after symptoms appear.
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If you have begun taking antibiotics for bronchitis, you usually stop being contagious 24 hours after starting the medication. If you have a viral form of bronchitis, antibiotics will not work. You will be contagious for at least a few days and possibly for as long as a week.
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You are most contagious soon after you are infected. Adults who are otherwise healthy are no longer contagious two weeks after the illness begins. Children and people with weak immune systems may be contagious for up to six months.
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Symptoms of influenza usually appear 1-4 days after exposure. How long can a person spread influenza? Persons are most contagious during the 24 hours before symptoms appear and may be contagious for up to 5 -7 days after getting sick.
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Adults are most contagious with the flu from 24 hours before symptoms start to three to five days afterward. Children can spread the virus for longer—up to 10 days, and sometimes even beyond that. People who have serious immune system problems can spread influenza for weeks, or even months, after they get it.
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This is called the incubation period. Once your symptoms do appear, they may last for two to four weeks. You can pass the virus to other people through your saliva for up to three months after your symptoms subside. Some studies have reported that you may still be contagious for up to 18 months.
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These illnesses have an incubation period of between two to six days. People typically start to become contagious in the hours preceding the initial onset of symptoms and remain contagious until the symptoms go away.
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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.