In this initial analysis, they could see one patient’s heart rate jump nine days before the person reported symptoms. Fitbits now collect heart data, and Google agreed to buy the company last year to get closer to the bodies of millions. These algorithms are able to spot things humans usually don’t notice about their own bodies, like a slightly elevated resting heart rate. The Oura ring, with about 150,000 users, isn’t nearly as popular as smartwatches and fitness trackers. RNI said its software is more than 90 percent accurate at forecasting the onset of coronavirus symptoms.

Source: Washington Post May 28, 2020 12:01 UTC