when exposed to the flu how long before symptoms?
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When Flu Spreads 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.
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Usually the symptoms develop between 5 days and two weeks after exposure to an infected person or surface. People are thought to be infectious from a day or two prior to the onset of symptoms until around 2 weeks after symptoms develop.
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Symptoms usually appear from one to four days after exposure to the virus, and they last five to seven days. For people who've had a flu shot, the symptoms may last a shorter amount of time, or be less severe.
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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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How long does it take to develop symptoms of influenza after being exposed? The incubation period of influenza is usually two days but can range from one to four days.
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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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Symptoms like sore throat, fever, headache, muscle aches, congestion, and cough tend to come on suddenly. Colds are usually less intense and include a runny or stuffy nose. The flu gets better over 2 to 5 days, but you might feel run-down for a week or longer.
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Flu: Comes on Fast and Furious Symptoms like sore throat, fever, headache, muscle aches, congestion, and cough tend to come on suddenly. Colds are usually less intense and include a runny or stuffy nose. The flu gets better over 2 to 5 days, but you might feel run-down for a week or longer.
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Cold symptoms usually start about 2 or 3 days after you came in contact with the virus, although it could take up to a week. Symptoms mostly affect the nose.
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It's to protect you from the severity of the infection. If you get the flu without a shot, you'll have symptoms for 5 to 14 days. If you get the flu shot and still contract the flu, the flu shot will shorten the duration of that infection so you're only ill a fraction of the time.
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According to the Centers for Disease Control and Prevention (CDC) , an uncomplicated influenza infection will last from three to seven days in most people, including children. However, a cough and feelings of weakness or fatigue can last for two weeks or longer.
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For those who do get sick, signs and symptoms usually appear one to three weeks after exposure and may include: Watery, sometimes foul-smelling diarrhea that may alternate with soft, greasy stools. Fatigue or malaise.
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Early signs of the flu include: fatigue. sudden fever (usually above 100°F [38°C]) scratchy or sore throat.
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The CDC defines flu symptoms to include fever (temperature of 100.3 degrees F [38 degrees C] or greater, or signs of fever such as chills, sweats, flushing, skin feeling hot) with cough and/or sore throat. In addition, you may experience headache, body aches, fatigue, nasal congestion, vomiting and diarrhea.
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The flu vaccine only protects against flu, not other illnesses. Another explanation is that it is possible to be exposed to flu viruses, which cause flu, shortly before getting vaccinated or during the two-week period after vaccination that it takes the body to develop immune protection.
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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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Flu generally starts more suddenly and severely than a cold, with a higher fever and chills. A child with the flu feels much more achy and uncomfortable. A child usually has a cold for 3-10 days. The flu lasts 7 to 14 days and symptoms may linger for up to 3 weeks.