when are you exposed to 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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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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The flu puts added stress on the body, which can increase blood pressure, raise your heart rate and increase the risk of a heart attack or stroke.
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The flu starts suddenly and hits hard. You will probably feel weak and tired and have a fever, dry cough, a runny nose, chills, muscle aches, a bad headache, eye pain, and a sore throat. It usually takes longer to get over the flu than a cold.
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Flu symptoms typically last about a week, but the most severe symptoms only occur for two to three days (though it might feel like an eternity). You might continue to experience fatigue, weakness, and a cough for another week after you recover.
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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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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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Two flu strains, peaking at different times At the start of the 2018-2019 flu season, the dominant circulating strain of virus was A(H1N1), and the flu vaccine was well matched to it. The more virulent strain, A(H3N2), was present at a low level until mid-January, when its incidence started sharply increasing.
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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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Incubation Period, Diagnosis/Symptoms and Immunity After initial (first) exposure, a person will usually get the stomach flu within 12-48 hours. The stomach flu is diagnosed based mostly on symptoms, including nausea, vomiting, diarrhea, muscle aches, abdominal cramps, and no fever or a low-grade fever.
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The flu is a respiratory disease, but it can affect the whole body. A child can become suddenly ill with any or all of these symptoms: Fever, which may be as high as 103°F (39.4°C) to 105°F (40.5°C) Body aches, which may be severe.
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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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The flu vaccine only protects against influenza, not other illnesses. Another explanation is that it is possible to be exposed to influenza viruses, which cause the 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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A bout of the flu typically follows this pattern: Days 1–3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable.
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Avoid touching your mouth, nose, or eyes. That's not easy to do, so keep those hands clean. If you have flu-like symptoms -- fever plus at least cough or sore throat or other flu symptoms -- stay home for seven days after symptoms begin or until you've been symptom-free for 24 hours -- whichever is longer.
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While colds and their symptoms don't often result in serious health problems, the flu can. Most people will get better within a few days to less than two weeks. For others, the flu can create life-threatening complications including pneumonia.
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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.