Pakistani health worker Irba Allahdad, 23, right, marks a wall of a 

Pakistani health worker Irba Allahdad, 23, right, marks a wall of a home after giving a child living there a polio vaccine, in a neighborhood in Islamabad, Pakistan, Wednesday, Jan. 30, 2013.  Some Islamic militants oppose the vaccination campaign, accuse health workers of acting as spies for the U.S. and claim the polio vaccine is intended to make Muslim children sterile. Pakistan is one of the few remaining places where polio is still rampant. (AP Photo/Muhammed Muheisen)
Associated Press
Pakistani health worker Irba Allahdad, 23, right, marks a wall of a home after giving a child living there a polio vaccine, in a neighborhood in Islamabad, Pakistan, Wednesday, Jan. 30, 2013. Some Islamic militants oppose the vaccination campaign, accuse health workers of acting as spies for the U.S. and claim the polio vaccine is intended to make Muslim children sterile. Pakistan is one of the few remaining places where polio is still rampant. (AP Photo/Muhammed Muheisen)
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