Only had the flu once when I was 45. Gonna turn 70 later this month. But I started getting them at age 65 after my doctor finally yelled at me to get one after refusing every year. He said if I know what's good for me I better start. Well; he's my doctor; I trust him, and he knows a hell of a lot more about that stuff than I do. I've heard lots of positive stuff from other senior citizens about getting your shot.
