"FILE - In this Friday, July 22, 2016, file photo teams from MSF carry out fumigation efforts in the Yolo Sud neighborhood of Kinshasa, Democratic Republic of Congo, in a bid to kill the mosquitos that transmit yellow fever. The World Health Organization has declared an end to the yellow fever outbreak that killed about 400 people in Congo and Angola, calling it ""one of the largest and most challenging"" in recent years. The outbreak, first detected in Angola in late 2015, caused 965 confirmed cases and thousands of suspected cases in both countries, the WHO said in a statement Tuesday, Feb. 14, 2017. (AP Photo/Jerome Delay, File)"
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