Potential effects of California's new vaccine exemption law on the prevalence and clustering of exemptions.

Jones, Malia; Buttenheim, Alison · Am J Public Health · 2014

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Abstract

Exemptions from childhood immunizations required for school entry have continued to increase among California kindergartners, and exemptions show spatial clustering within the state. A 2014 change in California's school-entry vaccine exemption law requires parents filing for an exemption to submit signed documents from a health care provider. However, the evidence presented here suggests that the policy change will probably not be sufficient to reverse the growing trend in vaccine refusals.

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