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A Cameroonian virologist trained in Belgium who ended up in Abidjan's Projet RETRO-CI after failing to find a good job in his country, John Nkengasong is committed to working in Africa. "There are many people in the States who are better than I am," says Nkengasong. "I can contribute to the development of Africa here."

(Photograph by Malcolm Linton)

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Science. ISSN 0036-8075 (print), 1095-9203 (online)