State investigates 4 doctors for issuing questionable vaccination exemptions - San Francisco Chronicle

State investigates 4 doctors for issuing questionable vaccination exemptions  San Francisco ChronicleCalifornia broadens investigation of doctors for issuing questionable vaccine exemptions  NBC NewsHow California made a 'dramatic' impact on kindergartners getting vaccinated  CNNSacramento-Area Doctors Accused Of Questionable Medical Exemptions  CBS SacramentoCalifornia broadens investigation of doctors over their vaccination exemptions  Sacramen