According to a Centers for Disease Control analysis of a 2017 immunization survey, 1.3 percent of children born in 2015 had not received any of the recommended vaccinations, more than quadrupling the number of 2-year-olds who went unvaccinated in 2000. That translates to about 100,000 children. The vaccination for measles, rubella and mumps is about 97 percent effective and its creation in the early 1960s was a significant step forward for children’s health. The CDC estimates that before the vaccination, some 3 to 4 million Americans got measles each year. Only about 500,000 cases per year were reported each year to the CDC, but of those, 400 to 500 died, 48,000 were hospitalized, and 4,000 developed encephalitis.