this "flu shot" scam goes back to the 70's, when the government inoculated 48 million people against "swine flu". lots of folks got guillian barre syndrome.
all these vaccine drives seem rather ineffective, as there are so many viruses.
does make some vaccine makers a lot of money, though.
i wouldn't do it, though i'm not anti-vaccine. (as long as the childhood ones are not live virus, but the killed or weakened ones, which require more innoculations, but lessen the abuse of the immune system. )
p.s. i am not a scientist, nor do i play one on t.v.