To jab or not to jab that is the question

I saw a poster today regarding having a flu jab and now find as a type 2 that I'm on the list of people that should have one!!!
I work in a school with primary children so wonder infact if this would be a good idea.
Anyone got any thoughts to help me make my mind up Please.

Thanks
Andy

Thanks for pointing that post out to me - it was very informative!