I have no plans for the flu shot.
I've gotten a tetanus shot a few times. To me, the shot was no big deal, so I don't have a problem waiting until I actually need it. My kids had to have tetanus shot to play sports in school.
Where I live, kids have to have certain shots...or no school. It has been that way for as long as I can remember. There are more shots required now...then when I was a kid. Couldn't tell you if that is a good or bad thing.
Also, where I live, shots are "pushed" a lot because so many parents don't keep up... and then are ticked when their child is denied entrance to school. Schools are trying to get the word out, before class starts.
Another reason...schools are paid per kid in attendance.
This won't sound very nice, but I think the all the shot info out there is just another way the schools have to babysit parents. School isn't just about Reading, Writing, and Arithmetic anymore.