John Nkengasong, director of the Africa Centers for Disease Control and Prevention, poses for a portrait at the organization's headquarters in Addis Ababa, Ethiopia, Tuesday, Sept. 15, 2020. The coronavirus pandemic has fractured global relationships, but as Africa's top public health official, Nkengasong has helped to steer the continent's 54 countries into an alliance that has won praise as responding better than some richer nations. (Mulugeta Ayene via AP)
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