I believe I read that even the AMA admitted flu vaccines didn't work on elderly, they advised giving it to seniors' grandchildren or children so they wouldn't give the flu to them. I'm more pessimistic, I don't and never have taken flu vaccines.
I took the shot twice in my life and got the flu, or as they like to say, the symptoms of the flu, from both shots. Knock me out of work for a week...Duh, I'm done...
Oh I remember telling the nurse for my second shot, that years before when I got my first shot I got the flu, she told me you can't yet the flu from the shot. Well my body said different...