Patients put a drop of blood on one side of the slip of paper, and on the other appears a colorful pattern in the shape of a tree, which tells medical professionals whether the person is infected with certain diseases. The chips test for multiple diseases at once. They also show how severely a person is infected rather than producing only a positive-negative reading.
Since people in remote parts of Africa and Asia often have to travel great distances by public transit or foot to reach a medical clinic, patients simply can take photos of the chips with cell phones and then send them to larger cities for diagnosis. Full Article
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