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1 in 5 kindergarten students not vaccinated at some state schools

November 1, 2011 12:00:00 AM PDT
A worrisome vaccination trend is putting some California school children at risk.

A new study finds that one in five kindergarten students at some California schools are intentionally unvaccinated because of their parents' personal beliefs.

Doctors say if there are too many children who aren't immunized, it could trigger an outbreak.

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