Pakistani Rangers soldiers walk past a woman after the body of Nasima Bibi, a female worker of an anti-polio drive campaign who was shot by gunmen, arrived at a hospital morgue in Karachi December 18. Gunmen shot five health workers on the anti-polio drive in a string of attacks in Pakistan on Tuesday, officials said, raising fears for the safety of workers immunizing children against the crippling disease. Athar Hussain/Reuters
Explainer: Why Polio Remains Endemic In Afghanistan, Pakistan, And Nigeria -- Radio Free Europe
A global multibillion dollar immunization campaign over the past few decades has made most of the world polio-free. But in Afghanistan, Pakistan, and Nigeria the crippling disease remains endemic.
Despite a coordinated United Nations polio-prevention drive in all three countries, dozens of children become paralyzed and ultimately die from the highly infectious disease every year.
Political unrest, poor health infrastructure, and government negligence are among the reasons for the failure. But the cause analysts cite most often is opposition from religious militant groups.
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My Comment: When you hear that Taliban factions in Afghanistan and Pakistan -- as well as Nigerian militant groups like Boko Haram -- have claimed polio vaccinations are "un-Islamic" and an attempt to thwart the will of God .... that is when you know that you have a problem.