how long are you contagious when you test positive for the 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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You're contagious for three to seven days after you come down with a cold.
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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. That's why it's best to get vaccinated before influenza viruses start to spread in your community.
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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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Call Doctor or Seek Care Now. Close Contact (exposure) with flu (influenza) within last 72 hours (3 days) and you are at High Risk of problems from the flu. See High Risk list; such as age more than 64, pregnant, chronic illness.
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4﻿ General recommendations are that you can return to daily activities once you have been symptom-free for 24 hours, but you are actually still contagious for three days after you recover and could spread the virus for up to 2 weeks.
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Symptoms usually appear within one to two days of exposure. Although you typically feel better after a day or two, you're contagious for a few days after you recover. The virus can remain in your stool for up to two weeks or more after recovery.
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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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The incubation period refers to the time between contracting an infection and experiencing symptoms. The World Health Organization (WHO) note that the typical incubation period for the flu is about 2 days but that it can range from 1 to 4 days. The symptoms of flu typically last about 3 to 7 days in most cases.
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While the general incubation period for the flu is usually between one and four days, this period can vary from person to person. The average incubation period for the flu is two days . This means that, on average, people start to develop flu symptoms about two days after coming into contact with the influenza virus.
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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.
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The incubation period is fairly short, between 1 and 5 days and infected persons can transmit influenza 1-2 days before they have symptoms to 4-5 days after the onset of symptoms. The influenza season in the U.S. usually occurs between December and March.
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The incubation period of canine influenza is approximately 2-to-4 days from initial exposure to the dog flu virus. Viral shedding starts to decrease after the fourth day, but dogs with H3N8 remain contagious for up to 10 days after exposure, and dogs with H3N2 remain contagious for up to 26 days.
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For colds, most individuals become contagious about a day before cold symptoms develop and remain contagious for about five to seven days. Some children may pass the flu viruses for longer than seven days (occasionally for two weeks).
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The average length of time a person is contagious after onset of illness is six months. The EB virus remains in the body for life, and periodically can be found in small amounts in the throat in otherwise completely healthy persons.
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If you have a viral infection, you will be contagious until your fever runs its course. If you have strep throat, you may be contagious from the onset until you've spent 24 hours on antibiotics. The common cold usually lasts less than 10 days. Symptoms, including fever, may peak around three to five days.
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What You Should Know - Influenza Exposure Within Past 7 Days: Although you were exposed to flu, you do not have any symptoms (such as cough or fever). Symptoms usually start within 1 to 4 days of close contact with another person with flu.