Patches of low vaccination in the US are becoming bigger, riskier holes - CNN

Patches of low vaccination in the US are becoming bigger, riskier holes  CNNVaccine exemptions for religious or personal beliefs are rising across the U.S., data shows  NBC NewsNonmedical Childhood Vaccination Exemptions Are Climbing  MedPage TodayMissing First MMR Vaccine Most Significant Predictor of Nonvaccination by Age 2 Years  Infectious Disease AdvisorRising Vaccine Refusals in US Children Increase Measles Risk  Букви