In this file photo taken Wednesday, Dec. 11, 2019, health officials prepare to vaccinate residents of the Malawi village of Tomali, where young children become test subjects for the world's first vaccine against malaria. The World Health Organization recommended that the world’s first malaria vaccine be given to children across Africa, in a move officials hope will spur the stalled progress against efforts to curb the spread of the parasitic disease. (AP Photo/Jerome Delay, File)
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