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Smartwatch can detect early signs of illness

Researchers at the Stanford University School of Medicine have developed a smartwatch app designed to alert users when their bodies show signs of fighting an infection, such as elevated heart rate. The app is powered by an algorithm that detects changes in an individual’s resting heart rate and step count.

A study of retrospective data found that the app was able to correctly flag signs of COVID-19 before symptoms arose, or as they arose, 63% of the time.