The Air Force forced me to get my first flu shot in 1975, after which I suffered the worst case of flu I believe I've ever had. The next year I was able to sweet talk a medical records clerk into checking off the 1976 shot in my medical records, then the military lost it's ability to make any requirement of me before the 1977 flu season approached, I don't believe they were required in 73 and 74 but if they were I don't recall it. I never got another until about 10 or 12 years ago when I decided to give it a chance and see what happened. I've gotten one each year since then and haven't had the flu since. My wife and I will both get our annual shot sometime in the next month or so.