Tiny chip made of paper diagnoses diseases and costs just a penny

from PopSci:

A Harvard University chemist has created a prototype “chip” technology out of paper that could help diagnose HIV, malaria, tuberculosis and other diseases for just a penny each time, according to CNN.

A drop of blood on one side of the paper chip results in a colorful tree-like pattern that tells physicians or nurses whether a person has certain diseases. Water-repellent comic-book ink helps channel the blood into the tree-like pattern, as several layers of treated paper react to the blood and create the telling colors.

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