Last week, were added to the coronavirus-fighting arsenal, and now, smart rings are going in as well. The idea is very similar - one of the first symptoms of the COVID-19 infection is the rise in body temperature. And while thermometers are far better at measuring this vital stat, smart rings are small, light, and can be worn all the time.

Dr. Ashley Mason, a UCSF assistant psychiatry professor, developed the project after her research on treating depression with sauna and extreme temperature was halted to give way to the more urgent viral matter. Dr. Mason quickly saw the connection between ...