How long will my arm feel sore from a flu shot?

A Answers (1)

  • AStacy Wiegman, PharmD, Pharmacy, answered
    Soreness in your arm after getting a flu shot typically lasts no longer than one to two days. The pain is a sign that your immune system is making antibodies in response to the viruses in the flu vaccine. The viruses are killed, so they can't infect you.
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