FILE - In this July 27, 2016, file frame from video provided by Vayu, Inc., residents from Ranomafana, Madagascar, watch before a drone containing medical samples takes off on a test flight from their remote village, which can only be reached on foot. Off Africa’s eastern coast in Madagascar, U.S. company Vayu completed drone flights to deliver blood and stool samples from rural villages, with support from the U.S. Agency for International Development. (Stony Brook University/Vayu Inc. via AP, File)
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