FILE - in this Monday, Sept. 10, 2012 file photo, a Pakistani medic gives a polio vaccine to a child in Peshawar, Pakistan. The World Health Organization said the northwestern Pakistani city of ... more 
FILE - in this Monday, Sept. 10, 2012 file photo, a Pakistani medic gives a polio vaccine to a child in Peshawar, Pakistan. The World Health Organization said the northwestern Pakistani city of Peshawar has become the largest poliovirus reservoir in the world. (AP Photo/Mohammad Sajjad) less 
1 / 29
Associated Press | Photo By Mohammad Sajjad
Fri, Jan 17, 2014 2:15 PM EST