This summer, California’s strict new childhood immunization law, barring all exemptions except those needed for medical purposes, went into effect for public and private schools, preschools, and day cares. This law was passed as a response to the highly-publicized 2014-2015 multi-state measles outbreak that originated at Disneyland, and also in response to the growing number of California communities with large clusters of families exempting their children from vaccine requirements, putting at risk community protection from vaccine-preventable illnesses.
As I’ve written about before, both here and in articles with Tony Yang, there are many different ways to structure childhood vaccination laws. While much of the attention goes to whether or not states offer parents the right to exempt their children based on religious and/or philosophical grounds — see, for example, the recent American Academy of Pediatrics report supporting mandated vaccination for school and daycare attendance — there are many other implementation-related details in the laws that can increase or decrease the law’s efficacy at maintaining high vaccination coverage rates. For example, some states may require that exemption requests be filed annually (increases efficacy), some states require only that a form be correctly completed (decreases efficacy), some states allow for historically anti-vax practitioners, such as naturopaths, to complete medical exemption forms (decreases efficacy, and creates a new, permanent loophole for gaining exemptions), some states require that medical exemptions be reviewed and approved by a state public health officer (increases efficacy). Read More