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Although polio has been wiped out in most of the world, it is a growing problem in India, Pakistan, Afghanistan and Nigeria. NewsHour special correspondent Fred de Sam Lazaro reports from Nigeria on efforts to fight the spread of the disease.
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| Vaccinators |
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| Polio is spread mainly through poor hygiene and sanitation, problems in much of the developing world. Here, health workers vaccinate children in a Nigerian village. |
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| Photo Credit: Fred de Sam Lazaro |
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