FILE - In this Wednesday, April 24, 2013 file photo, a Somali baby receives a polio vaccine at the Medina Maternal Child Health center in Mogadishu, Somalia. Health authorities on Tuesday, Aug. 25, 2020 are expected to declare 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. (AP Photo/Ben Curtis, File)
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