03/07/2014 12:54 pm ET

Unvaccinated Kids Make Everyone Sick

One of America's essential national defense shields is under attack from within, and the aggressors are people you wouldn't normally consider dangerous: parents of young children. As more and more resist having their school-age kids vaccinated, they are destroying the herd immunity that everyone relies on for protection against whooping cough, measles and other dangerous, sometimes fatal, infectious diseases.

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