Your vaccine at work: The flu vaccine is designed to create an immune response to flu components. The pain felt is associated by the cytokines (proteins serving as a communications device) produced by local and immune cells that can cause white blood cell localization and inflammation . This is normal and part of the process that is meant to protect you form the flu itself
Answered 1/19/2018
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Somewhat: About 5% of individuals who receive the flu vaccine will experience 3 or 4 days of a mild flu-like illness after the injection.
Answered 10/15/2017
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