The volunteers were killed Sunday in the Pakhtunkhwa . Sunday 's killings capped a bloody weekend dominated by a bus bombing and hospital siege in Quetta , the capital of the southwestern province of Balochistan . Vaccination programs have been targeted by Islamic State . Pakistan had 58 cases of infection in 2008 . The CIA used a fake vaccine program to verify bin Laden 's location .
The volunteers were killed Sunday in the Pakhtunkhwa . Vaccination programs have been targeted by Islamic State . Pakistan had 58 cases of infection in 2008 . The CIA used a fake vaccine program to verify bin Laden 's location .