Blog: Measles outbreaks in U.S. and Europe should be a wake-up call for states with loose immunization rules

That outbreak was scary, but it served as a wake-up call to California lawmakers, who just months later banned all exemptions for vaccinations except those for medical reasons. Childhood immunization rates immediately rebounded statewide, reaching 95% for the first time in decade, including in school districts where rates had dropped the most precipitously.