I never do the flu shot, but I must admit that I do a tetanus shot every ten years. I do believe in the tetanus vaccine. After reading floride conspiracies, I started paying attention to cavities. I stopped doing the floride and was cavity free for a couple of years. I moved and new dentist and the assistant sold me on doing a floride rinse. Next visit I had two cavities. Been over five years but I have had neither a cavity or floride treatment since.
I took a “free” flu shot in November 2014 and was sick four or five times after that, twice with bronchitis. Never had that happen before when I avoided such a shot