how long do flu shot symptoms last?
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The most common side effects from flu shots are soreness, redness, tenderness or swelling where the shot was given. Low-grade fever, headache and muscle aches also may occur. If these reactions occur, they usually begin soon after the shot and last 1-2 days.
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The most common side effects with the injection are bone, muscle and joint pains, flu like illness and headache. The flu like symptoms generally disappears after 24-48 hours and usually occurs only after the first injection.
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It takes about two weeks for the flu shot to take full effect. If you're exposed to the influenza virus shortly before or during that time period, you might catch the flu.
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The high dose and adjuvanted flu vaccines may result in more of the temporary, mild side effects that can occur with standard-dose seasonal shots. Side effects can include pain, redness or swelling at the injection site, headache, muscle ache and malaise, and typically resolve with 1 to 3 days.
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Although fever and the most severe symptoms typically resolve within a week, some people have low energy for up to 2 weeks, and it is possible to experience a cough for up to 8 weeks. The flu shot reduces the risk of getting the flu but does not eliminate it.
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The effects of the vaccine generally only last through one flu season, which is about six months long. That's part of the reason you need one every year. Starting two weeks after you get a flu shot, you should be protected from certain influenza viruses for the remainder of that flu season.
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Most people have no problems from the vaccine. If you get the flu shot, you might have a mild fever and feel tired or achy afterward. Some people also have soreness, redness, or swelling where they got their shot. These problems aren't serious and don't last long.
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The most common side effect in people who do have symptoms from the shot is soreness at the injection site, Dr. Adalja says. Other possible flu shot side effects include hoarseness, a cough, fever, aches, headaches, itching, fatigue, and sore, red, or itchy eyes, the CDC says.
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If your baby or toddler comes down with the flu, symptoms usually last about a week but can linger for up to two weeks.
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Flu vaccines cause antibodies to develop in the body about two weeks after vaccination. These antibodies provide protection against infection with the viruses that are used to make the vaccine.
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Side effects usually last 1-2 days. There are several different makes of flu vaccine available each year.
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The most common side effect is a sore arm – the area around the site of the injection may turn red and feel sore after your vaccination, which can last for up to 2 days.
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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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Symptoms due to viral URI typically last 2–14 days, but some symptoms can linger for several weeks (most people recover in about 7–10 days). Productive cough or discolored nasal discharge does not necessarily require antibiotic therapy. Influenza (flu) is a viral infection caused by the influenza virus.
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Sore throat: A sore throat brought on by flu may be severe and typically lasts 3 to 5 days. Weakness and fatigue: Weakness and fatigue can be so severe that they interfere with normal activities, such as attending work and school.
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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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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.