Only flu shot I ever had was in the Navy.
We all wound up so fucking sick.
Something extra fucky is going on with the shots now, though I tell you. I've had SEVERAL very healthy people (including the neighbor!) fall dead after having theirs. Can't say for sure it's that, but I think we all know.
Combine that shit with a cocktail of other vaccinations all at once after being drained dry and you may as well invest in a coffin.