Kinsa Health's smart thermometers, which have been successful in predicting the spread of flu in previous years, could be used to track the spread of COVID-19 (Donald G. McNeil Jr/New York Times)

Donald G. McNeil Jr / New York Times:
Kinsa Health's smart thermometers, which have been successful in predicting the spread of flu in previous years, could be used to track the spread of COVID-19  —  A company that makes internet-connected thermometers has followed the flu more closely than the C.D.C. can.