Flu shot?

Our school district will start giving shots within the following weeks (free). We have to make a decision on whether or not to let DS have it. I'm on the fence...leaning more towards NO, but then I hear these horror stories about kids dying and I'm not sure. DH has a physical next week and is going to talk to our dr about the shot. DH doesnt even get the regular flu shot and none of us have ever had the " confirmed" regular influenza and I didnt even start getting the shot until a couple of years ago. I read where 36,000 people die each year from the regular flu.. so while I am worried.. I am not too worried... if that makes sense. I think for most people its done and over within a week.