When I was about 62, I went to the doctor with an itch. He looked at it and said "That is a classic case of shingles" and he gave me a shot.
The shingles went away, the itching stopped in under a week and I have never had a recurrence.
Not only do I get a flu shot every year, I get a shot at a medical lab that is always working on new vaccines, and they pay me. Last year I got $150.
I also have never had the flu.