This One-Cent Lab-on-a-Chip Can Diagnose Cancer and Infections

https://singularityhub.com/2017/02/19/one-cent-lab-on-a-chip-can-detect-cancer-and-infections/

"Immune cell counts are often used to diagnose infectious diseases like tuberculosis and malaria, and traditionally done with a technique called flow cytometry that can cost $100,000 for the equipment alone. The penny chip performed just as well."