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

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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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.