Measles Outbreaks Prompts Possible Vaccination Bill in WA Clark County representative Monica Stonier is co-sponsoring the proposed bill. Under it, parents cannot cite philosophical or personal reasons as exemptions for leaving their child unvaccinated. Medical and religious reasons would still be allowed as exemptions. Only 78% of Clark County kids between the ages of six and eighteen have received their measles vaccine. WA Governor Jay Inslee has declared a state of emergency for the region following 56 cases of the infectious disease. Parents who choose not to vaccinate their children do so out of fear it will cause both physical and behavioral reactions. Doctors contend that the vaccine is "highly effective" and that the benefits "greatly outweigh the risks." Measles was once considered eradicated in the U.S.