9 Million US Kids at Risk for Measles

About 9 million U.S. children are susceptible to measles, either because they haven't received the vaccine against the viral disease or because they aren't up to date with their shots, a new study shows. The findings suggest that although enough people are vaccinated to prevent measles from spreading widely in the United States, there could still be large outbreaks of the disease, due to clusters of unvaccinated children, the researchers said. "We can't get complacent" about vaccinating kids aga