Measles Outbreak Spreads in California, Other States - NBC News.com

Measles Outbreak Spreads in California, Other States - NBC News.com: "In fact, the widening outbreak coincides with new evidence that clusters of California parents have refused to vaccinate their children — decisions that boost the risk of measles hitting hard in certain towns or cities, pediatricians say.

Researchers checked the immunization records of more than 150,000 children who are members of Kaiser Permanente Northern California — all born between 2000 and 2011, and all covered continuously by that health-care provider, which serves about 40 percent of the insured population in 13 Northern California counties.

The analysis found five residential pockets inside which vaccine refusal rates among parents ranged from 5.5 percent to 13.5 percent between 2010 and 2012. Those areas include a stretch of the East Bay area, from El Cerrito to Alameda, California."



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