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A 39-year-old member asked:

For what length of time do flu symptoms from a flu shot last?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
1 to 2 days usually: The flu shot has inactivated virus- so it will not infect you with the flu. If you have reactions to the shot they usually resolve within one to two days. Side effects can include a low grade fever, aches & pain, and localized swelling, redness and pain at the shot site. Some people have had allergic reactions to the flu vaccine.

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Last updated Dec 10, 2013
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