If you don't vaccinate your child, it's not only your child that is at risk. It's also other children, including other children who, for medical reasons, can't be vaccinated.

If you have been vaccinated for polio, mumps, measles, chicken pox, hepatitis, or rabies, it may be too late for you to stand your ethical ground: You have already benefited from fetal-tissue research. This is, after all, a practice that's been legal since the 1930s.