Growing Number of Children Aren't Vaccinated The number of children who aren't being vaccinated by 24-months-old in the U.S. has been br gradually increasing, Roughly 100,000 children have not had vaccinations against any of the br 14 diseases for which shots br are recommended. Dr. Amanda Cohn, of the CDC, via CBS News The latest numbers come from a 2017 telephone survey of the parents of about 15,000 toddlers, Uninsured and Medicaid-insured br children were less likely to be vaccinated. The percentage of unvaccinated children has quadrupled from br 0.3 in 2011 to 1.3 in 2015. Dr.