how many days does it take to test positive for the flu?
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How long does it take for flu symptoms to show up? 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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Antiviral drugs work best when taken within 48 hours of onset of flu symptoms, but they may still offer benefits when taken later. These medications may reduce the duration of flu by one to two days and prevent severe flu complications.
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How long until the flu vaccine is effective can vary from person to person, but generally it takes two weeks after vaccination for the body to develop antibodies that provide protection against flu viruses. This is why it's important to not delay immunization.
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Swine flu is contagious about one day before symptoms develop to about five to seven days after symptoms develop; some patients may be contagious for a longer time span. The disease lasts about three to seven days with more serious infections lasting about nine to 10 days.
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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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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. For other people, the symptoms may last longer.
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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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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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Results can take from four days to two weeks, according to the Centers for Disease Control and Prevention (CDC). Molecular tests of blood are not likely to detect the virus after 7 days of illness.
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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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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. For other people, the symptoms may last longer. Even when symptoms resolve, you may continue to feel fatigued.
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How long does the flu last? Certain flu symptoms tend to last longer than others. The fever typically resolves in two to three days but can last as long as a week or more. The sore throat often gets worse even while the rest of the symptoms resolve, and can easily last a week or longer.
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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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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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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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If you test negative Talk with your healthcare provider about your test result and the type of test you took to understand what your result means. You could still have a current infection. The test may be negative because it typically takes 1–3 weeks after infection for your body to make antibodies.
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The body can take up to three months to produce these antibodies. Most people will have enough antibodies to test positive within three to 12 weeks after contracting HIV. At 12 weeks, or three months, 97 percent of people have enough antibodies for an accurate test result.