A member asked:

Is it true that it can take up to a month before the positive effects of the flu shot take their full effect?

A doctor has provided 1 answer

Influenza vaccine: Usually effective within 10-14 days, but in some persons it is conceivable that it may take longer. Still, not a reason not to be vaccinated.

Answered 11/12/2013

4.8k views

Thank

Related Questions