http://www.npr.org/2011/07/18/138476664/should-people-who-refuse-vaccines-pay-a-price "Measles can be almost entirely eliminated by universal vaccination. But vaccination rates are down, because some people refuse the shots on philosophical or religious grounds. Others worry the injections are harmful, despite overwhelming scientific evidence to the contrary. Public health officials agree choosing not to vaccinate raises the risks for everybody. And David Ropeik, an author and instructor at Harvard University, argues it's time for those who refuse vaccines to face consequences."