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Unvaccinated individuals face 140 times higher risk of contracting measles. Sarah L. Voisin/The Washington Post via Getty Images

What declining vaccination rates mean for families in Allegheny County – where 1 in 3 kindergarten classrooms lack herd immunity for measles

As childhood vaccination rates in Allegheny County decline, The Conversation asked experts why parents are opting out and how to protect vaccination policy.

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