A Pakistani health worker gives polio vaccine to a child at a neighborhood of Lahore, Pakistan, Monday, May 4, 2015. Pakistan’s beleaguered battle to eradicate polio is threatening a global, ... more 
A Pakistani health worker gives polio vaccine to a child at a neighborhood of Lahore, Pakistan, Monday, May 4, 2015. Pakistan’s beleaguered battle to eradicate polio is threatening a global, multi-billion dollar campaign to wipe out the disease worldwide. (AP Photo/K.M. Chaudary) less 
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Associated Press | Photo By K.M. Chaudary
Mon, May 4, 2015 2:15 PM EDT