how long are you contagious with respiratory flu?
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When Flu Spreads People with flu are most contagious in the first three to four days after their illness begins. Most 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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Walking pneumonia spreads through sneezes or coughs. But it spreads slowly. If you get it, you could be contagious (which means you could spread it to other people) for up to 10 days. Researchers think it takes a lot of close contact with an infected person for a healthy person to catch walking pneumonia.
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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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The incubation period is usually between 3 and 7 days from the time you are infected until you develop symptoms. You can usually spread the virus to someone else beginning about 3 days after you are infected until about 10 days after you develop symptoms.
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How long am I contagious after the flu? After I take Tamiflu? The Centers for Disease Control and Prevention (CDC) recommends people with the flu to stay home until 24 hours after they are fever free without the use of a fever-reducing medication.
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If you've been exposed to the bacteria, you can be contagious a few days before symptoms start. If you're treated with antibiotics, you'll remain contagious until you've been on antibiotics for at least 24 hours. If you don't seek treatment, you'll remain contagious for 2 to 3 weeks after contracting the infection.
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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 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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How long is it contagious? You are generally most contagious during the first week of illness. But, children with hand, foot, and mouth disease may shed the virus from the respiratory tract (nose, mouth and lungs) for 1-3 weeks and in the stool for weeks to months after the infection starts.
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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.
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The bottom line The common cold is a contagious viral infection with an incubation period of one to three days. This means it could take up to three days for you to notice symptoms after being exposed to the virus.
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How soon do symptoms appear? 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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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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Once a person who has pneumonia starts on antibiotics, he or she only remains contagious for the next 24 to 48 hours. This can be longer for certain types of organisms, including those that cause the disease tuberculosis. In that case, someone can remain contagious for up to two weeks after starting on antibiotics.
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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.
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Symptoms can begin about 2 days (but can range from 1 to 4 days) after the virus enters the body. That means that you may be able to pass on the flu to someone else before you know you are sick, as well as while you are sick. Some people can be infected with the flu virus but have no symptoms.
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Individuals with suspected or confirmed flu, who do not have a fever, should stay home from work at least 4-5 days after the onset of symptoms. Persons with the flu are most contagious during the first 3 days of their illness.