CDC News:
Can a flu shot give you the flu?
No, a flu shot cannot cause flu illness.
Flu vaccines given with a needle are made in two ways:
- the vaccine is made either with
- a) flu vaccine viruses that have been ‘inactivated’ and are therefore not infectious; or
- b) with no flu vaccine viruses at all (which is the case for recombinant influenza vaccine).
The most common side effects from the influenza shot are soreness, redness, tenderness or swelling where the shot was given. Low-grade fever, headache and muscle aches also may occur.
In randomized, blinded studies, where some people get inactivated Read More








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