By Steven Reinberg
MONDAY, Jan. 19, 2015 (HealthDay News) — Parents who refuse to have their children vaccinated appear to be clustered in certain areas, a new study suggests.
Among more than 150,000 children in 13 counties in Northern California, the researchers found five clusters where kids had missed one or more vaccinations by the time they were 3 years old.
“It’s known from other studies that areas where there are clusters of vaccine refusal are at higher risk of epidemics, such as whooping cough epidemics,” said lead investigator Dr. Tracy Lieu, a pediatrician and director of the division of research at Kaiser Permanente Northern California, in Oakland.
“Clusters may deserve special outreach efforts to make sure parents have all the information they need to make informed decisions about vaccination,” she said.
Specifically, the researchers found the rate of missed vaccinations within these clusters ranged from 18 percent…
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