And, Commie, I was a Peace Corps Volunteer in West Africa, and saw plenty of polio victims--the kids tended to be dragging their polio-wasted legs behind them with flip-flops on their hands. Adults had hand-crank-powered wheelchairs, generally. I watched the most horrifying spinal tap of my life on a little girl whose diagnosis was (viral) meningitis based on the clinic nurse "tapping" her spine with needle off a hypodermic syringe and spinal fluid in a broken test tube held up to the light in the window.
That whole experience has solidified my "vaccinate early, vaccinate often" take, and having kids has only reinforced it. If you have a history of allergic reactions to vaccines or whatnot, it's a whole different ballgame, but for those of us that get a sore arm for a couple days for shots, it's a no brainer.