Allergy to flu shot: 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. Potential allergic rxn's could include hives, difficulty breathing,
Answered 5/17/2017
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