A Pakistani police officer, left, stands guard while a polio worker vaccinates an Afghan refugee child against polio in a slum on the outskirts of Islamabad, Pakistan, Wednesday, Jan. 21, 2015. Militants have spread a rumor among ultraconservative parents in Pakistan’s deeply religious northwest, saying the polio vaccine will make their children impotent. The vaccine, they claim, is a ploy by the West to limit the world’s Muslim population. (AP Photo/Muhammed Muheisen)
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