Africa now free of wild poliovirus, but polio threat remains
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Health authorities on Tuesday declared the African continent free of the wild poliovirus after decades of effort, though cases of vaccine-derived polio are still sparking outbreaks of the paralyzing disease in more than a dozen countries.
Health authorities on Tuesday declared the African continent free of the wild poliovirus after decades of effort, though cases of vaccine-derived polio are still sparking outbreaks of the paralyzing disease in more than a dozen countries.
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