Karman Willmer, left, and Shelby Messenger protest against SB277, a measure requiring California schoolchildren to get vaccinated, at a Capitol rally, Tuesday, June 9, 2015, in Sacramento, Calif. The bill, sponsored by Democratic Sens. Richard Pan of Sacramento and Ben Allen of Santa Monica, would only allow children with serious health problems to opt out of school-mandated vaccinations. (AP Photo/Rich Pedroncelli)
Vaccines California
