Influenza vaccine: Flu shot side effects may include: slight swelling, redness or pain at vaccination site. If headache, nausea, fever or muscular pain occur they usually resolve within 1 to 2days. You won't get the flu from a flu shot because the virus either contains inactivated virus or doesn't have virus particles in it. The body can reacte to inactivated or recombinant material.Severe side effects are rare
Answered 1/22/2020
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3 doctors weighed in across 2 answers
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