A credit card-sized chip can diagnose HIV infection and provide T cell counts to guide treatment, according to a recent paper in Science Translational Medicine.
The fluid-processing chip provides accurate test results in less than 20 minutes using a single drop of blood that goes directly into the testing chamber and does not require trained handling.
The chip is designed to work in a battery-powered handheld device that would “deliver simple HIV diagnostics to patients anywhere in the world, regardless of geography or socioeconomic status,” the researchers say in the paper.
Nearly 7 in 10 HIV-infected people live in poor parts of the world. Many have to travel long distances to get to a clinic, making coming back for test results a major ordeal.