In this Tuesday, Feb. 26, 2019, file photo, health workers give a training presentation about how to detect and prevent the spread of Ebola, in an army barracks outside South Sudan's town of Yei. (AP Photo/ Sam Medrick)
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In this Tuesday, Feb. 26, 2019, file photo, health workers give a training presentation about how to detect and prevent the spread of Ebola, in an army barracks outside South Sudan's town of Yei. (AP Photo/ Sam Medrick)
