I think there is a valid question though of what diseases should you be immunized for as a society. Smallpox is wiped out, should we still immunize for it? Chicken pox also has a vaccine, but if you get it as a child you only risk a week at home, some itching, and maybe a scar if your parents can stop you from itching too much. With such minor risks I probably wouldn't have a kid get the chicken pox vaccine (hell, I'd probably go send him to play with the kids who just came down with it- get immunity the old fashioned way). Risk/reward is off there. I would get him immunized for mumps, measels, rubella, etc the risks of the disease there outweigh the negative of immunization.