Sitting outside his mud-brick home in the tiny village of Meliandou, Guinea, Etienne Ouamouno holds a crumpled picture in which he cradles his newborn son, Emile.
Etienne explains that Emile was a playful toddler, and used to like playing outside the house with his ball and listening to the radio. But in December last year, the two-year-old got sick.
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