When should i get a flu shot? who should get the flu vaccine?

Flu mutates a lot: The inject-able flu vaccine can help you build protective antibodies to the flu strains in the vaccine as soon as you have a competent immune system. This is 6m of age.The WHO/CDC select the strains that go in the seasonal vaccine & moves to production. It will protect a person starting a week or so after it is given with protection of those strains lasting years. Get it as soon as it is available