guess I will take my chances answering
Timely thread as DD just called about the same thing.
I go the shot once, probably 20 years ago...sickest I've ever been. Never again. I can't remember the last time I had the flu. Have I gotten sick? Sure, but not the flu or the strains you hear going around. DH got the shot once~ 2 weeks later sick as a dog. Ironically DD called tonight as she was heading to get one, asking if she should or not as we both reacted poorly. She is deciding to go ahead with it as her commute entails a lot of PT and flu already getting bad in her area. Fingers crossed she does better than DH and I did. DS says no way is he getting one.