Fitbit Wants to Detect Early Covid-19 Symptoms

What if a smartwatch was able to learn the patterns of an early Covid-19 infection? Not only could it save your life, but also prevent thousands of infections. Fitbit’s new smartwatch could be the first step in that direction. In OneZero, David Pogue writes about the possibilities and caveats of detecting an early Covid-19 infection through measuring breathing rate, resting heart rate, and pulse variability.