U.S. vaccination rates high, but pockets of unvaccinated pose risk

The vast majority of U.S. kindergarten-age children are vaccinated against preventable diseases but sizable pockets of unprotected children still exist, posing a public health threat, according to a government study. Only 1.7 percent of U.S. parents of kindergartners sought exemptions in 2014 from laws requiring children be vaccinated, according to the U.S. Centers for Disease Control and Prevention study.