how long does it take flu symptoms to show after being exposed?
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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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Signs and Symptoms. Symptoms may appear anywhere from 2 to 21 days after contact with the virus, with an average of 8 to 10 days.
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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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An infected person can spread the flu for five to seven days after becoming infected. The infectious period can begin 24 hours before the onset of symptoms. This means you can spread the flu without even knowing you're sick.
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What are the symptoms and when do they start? Symptoms of fever, poor appetite, runny nose and sore throat can appear three to five days after exposure. A blister-like rash on the hands, feet and in the mouth usually develops one to two days after the initial symptoms.
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It may take one to four days after exposure to the influenza virus for symptoms to develop. If you have the flu, you'll be contagious one day before developing symptoms and up to five to seven days after becoming ill. Younger children or people with a weakened immune system may be contagious for longer.
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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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Although you were exposed to flu, you do not have any symptoms. Symptoms usually start within 1 to 4 days of close contact with another person with flu. Seven days is an outer limit. Since 7 days have passed, you should be safe and not get the flu from this exposure.
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For most flu viruses, that window is about a week, starting from a day before your symptoms appear, to six or seven days afterward. For colds, even people who are feeling better can spread the virus to others for up to three weeks.
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The symptoms of 24-hour flu typically appear one to three days after you've been infected and can include: diarrhea. nausea or vomiting. abdominal cramps or pain.
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Flu is usually most infectious from the day your symptoms start and for a further 3 to 7 days. Children and people with lowered immune systems may be infectious for a few days longer.
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“Stomach flu symptoms include stomach pain, nausea, vomiting and diarrhea,” Miller says. “A low-grade fever, chills and muscle aches aren't uncommon to experience as well. Symptoms can start as little as 12 hours after exposure.”
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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. Abdominal cramps and bloating.
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Flu symptoms in children usually start to occur around two days after exposure to the virus. These symptoms typically last five to seven days, though they can last up to two weeks.
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When Flu Spreads 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. Children and some people with weakened immune systems may pass the virus for longer than 7 days.
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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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Does flu vaccine work right away? No. It takes about two weeks after vaccination for antibodies to develop in the body and provide protection against influenza virus infection.