The number of parents who chose not to give their children school-required vaccines due to nonmedical reasons increased between the 2005-2006 and 2010-2011 school years, Emory University researchers found. They noted that states with less strict vaccine exemption policies as well as those that allowed philosophical exemptions had higher rates of nonmedical exemptions. The findings appear in the New England Journal of Medicine. PhysiciansBriefing.com/HealthDay News (9/19)