Researchers at the Stanford University School of Medicine—in collaboration with the University of California-Berkeley—have developed a wearable sweat sensor that can diagnose cystic fibrosis, a genetic chronic disease that affects the lungs and digestive system.

Sweat contains valuable information, according to Sam Emaminejad, a former Stanford postdoctoral scholar who is now an assistant professor of electrical engineering at UCLA. In particular, sodium and chloride levels in sweat are diagnostic markers for cystic fibrosis, which causes mucus to build up in the lungs, pancreas and other organs, he says.

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