Vaccination refusers: Tide of 'belief exemptions' grows in California
Thousands of California parents are choosing not to vaccinate their children, despite last year's record-setting whooping cough outbreak. And the number is growing, much to the alarm of pediatricians and state health officials. Over the past decade, "personal belief exemptions" (PBEs) have tripled. Signed by parents, the exemptions allow children to enter school missing some or all vaccines. Statewide, more than two percent of kindergarteners have such exemptions. With a 9.5 percent PBE rate -- more than four times the state average -- Santa Cruz County is close to ground zero in this often heated and emotional debate. State experts say that as long as 95 percent of a population is immunized, "herd immunity" keeps contagious diseases from spreading. But vaccine refusal tends to concentrate in geographical areas like northern Santa Cruz County, where close to 17 percent of incoming kindergarteners had PBEs on file last fall – one of California’s highest rates. "If they were scattered fairly evenly around the state, the implications would be much less concerning," said Dr. Rob Schechter, medical officer with the Immunization branch of the state Department of Public Health, which collects the statistics on student immunizations. "The fact that they are concentrated in communities, social networks and schools with much higher rates -- that allows disease to spread much more rapidly."




