Pakistan polio vaccine campaign at center of bombing that killed 6 police officers
Pakistan and Afghanistan are the only countries where the virus is still endemic, and in recent years more than 200 polio vaccination workers have been killed.
A polio worker administers polio vaccine to a child, who arrived from the Khyber-Pakhtunkhwa province, during a vaccination campaign at a bus stop in Rawalpindi May 13, 2014.(photo credit: REUTERS/Sara Farid)ByARSHAD MEHMOOD/THE MEDIA LINE
