One of the world's great humanitarian crises has a simple cause and, some researchers argue, a simple solution. But that's where the story gets complicated. Around the world, 250 million children are vitamin A-deficient, including about a third of the world's preschool-age population. This simple deficiency kills or blinds millions of women and children each year. In places like the United States, where vegetables like carrots are neither expensive nor scarce, it's difficult to grasp just how p...
One of the world's great humanitarian crises has a simple cause and, some researchers argue, a simple solution. But that's where the story gets complicated. Around the world, 250 million children are vitamin A-deficient, including about a third of the world's preschool-age population. This simple deficiency kills or blinds millions of women and children each year. In places like the United States, where vegetables like carrots are neither expensive nor scarce, it's difficult to grasp just how p...
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