11/27/2014 01:10 am ET Updated Nov 27, 2014

Polio Crisis Deepens In Pakistan, With New Cases And Killings

Pakistan’s polio crisis has reached new depths this year, health officials say, intensified by a deadly mix of ruthless militant violence, large-scale refugee displacement and political chaos that has cemented the country’s role as the central global incubator of a disease that other conflict-torn countries have managed to hold in check.

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