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Professor Jean-Jacques Muyembe-Tamfum holds a test tube tray during an Ebola epidemic. Muyembe-Tamfum was the Zairean doctor in charge of the World Health Organization (WHO) operation during the 1995 Ebola epidemic that killed 245 people in the city of Kikwit over a period of a few months. (Photo by © Patrick Robert/Sygma/CORBIS/Sygma via Getty Images)