“A camera that can measure the heat—or infrared radiation—that an object gives off was invented in 1929.  Nearly 100 years later, in the midst of the coronavirus pandemic, this health tracking technology has become an essential eye on the rebound of public life. Infrared thermometers and cameras—found on everything from hand-held devices to robots and drones—are now installed in airports and train stations, Amazon warehouses, Apple stores, local hospitals, shopping malls and grocery stores around the world. If it’s not already, temperature scanning will soon be part of the way we live and work.”

https://www.forbes.com/sites/carolinehoward/2020/05/16/thermal-imaging-is-hot-photographs-of-a-fevered-time/#38dc916a5d69