what is in a flu shot vaccine?
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Many flu vaccines are made by growing the viruses inside fertilized chicken eggs. This means that they contain a small amount of egg protein. A newer version of the vaccine, called Flucelvax, is grown in animal cells instead.
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The flu vaccine can't give you the flu. But you might develop flu-like symptoms — despite getting a flu vaccine — for a variety of reasons, including: Reaction to the vaccine. Some people experience muscle aches and a fever for a day or two after receiving a flu vaccine.
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WHAT THE EVIDENCE SAYS: Currently available flu vaccines are aluminum-free and over 80% of flu vaccines today contain no mercury at all. Some flu vaccines contain a tiny amount of formaldehyde that is less than 1% of the amount naturally found in people and is safely cleared from the body.
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Definition of Terms Vaccine: A product that stimulates a person's immune system to produce immunity to a specific disease, protecting the person from that disease. Vaccines are usually administered through needle injections, but can also be administered by mouth or sprayed into the nose.
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Influenza vaccine. Influenza vaccines, also known as flu shots or flu jabs, are vaccines that protect against infection by influenza viruses. New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes.
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Mid-season estimates suggest that the flu shot has reduced the risk of illness by around 47% in vaccinated people, according to a report from the Centers for Disease Control and Prevention (CDC) released Thursday. During the severe 2017-2018 flu season, vaccine efficacy was estimated at just 36%.
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['Hepatitis B Vaccine. ... ', 'Hepatitis A Vaccine. ... ', 'Influenza Vaccine. ... ', 'Measles, Mumps, and Rubella (MMR) Vaccine. ... ', 'Inactivated Polio Vaccine. ... ', 'Tetanus-Diphtheria Vaccine. ... ', 'Typhoid Vaccine. ... ', 'Yellow Fever Vaccine.']
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The flu shot is made from dead viruses and cannot "give" you the flu. However, the vaccine can trigger an immune response from your body, so you may have a few mild symptoms, like achy muscles or a low-grade fever. The nasal flu vaccine, FluMist, is made with a weakened live flu virus.
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['Live-attenuated vaccines.', 'Inactivated vaccines.', 'Subunit, recombinant, polysaccharide, and conjugate vaccines.', 'Toxoid vaccines.']
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Why do some people not feel well after getting the seasonal flu vaccine? Some people report having mild reactions to flu vaccination. 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.
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Quadrivalent flu vaccines include: Standard-dose quadrivalent influenza shots that are manufactured using virus grown in eggs. These include Afluria Quadrivalent, Fluarix Quadrivalent, FluLaval Quadrivalent, and Fluzone Quadrivalent. Different influenza shots are licensed for different age groups.
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Some people report having mild reactions to flu vaccination. 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 nasal spray vaccine contains a "live attenuated" flu virus, but the virus is weakened so that it cannot cause the flu. The viruses in the nasal spray can't replicate in the warm temperatures of the lungs and other parts in the body.
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All flu vaccines contain egg proteins and formaldehyde. In addition: VAXIGRIP contains traces of neomycin (an antibiotic), thimerosal (a preservative). FLUVIRAL contains thimerosal (a preservative). INFLUVAC has the antibiotic gentamicin.
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Some flu vaccines are made using eggs. As a result, the vaccines have tiny amounts of egg proteins in them. However, this doesn't necessarily mean that if you're allergic to eggs you can't get a flu shot. There are two flu vaccines that don't contain egg proteins and are approved for use in adults age 18 and older.
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According to the CDC, mild side effects from the flu shot include soreness, redness or swelling at the injection site, low-grade fever and aches. Only about 1 percent to 2 percent of people who get a flu shot will have fever as a side effect, Schaffner said.
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Side effects of the flu vaccine are generally mild and go away on their own within a few days. Common side effects from the flu shot include: Soreness, redness, and/or swelling from the shot. Headache.