State legislators across the country are moving to tighten limits on vaccine exemptions for children amid one of the worst outbreaks of preventable diseases in recent history.
In response, an unusual coalition of libertarians and liberals influenced by a debunked study has launched a loud and at times threatening campaign to protect the statutory exemptions. A few instances required police intervention.
Legislators in 26 states have introduced bills to crack down on parents who request vaccine exemptions for either personal or religious reasons. Three states — Washington, Maine and New York — have passed those measures. A fourth — California — is likely to pass its version next month.