A technology startup has begun marketing two-wheel robots equipped with movable germicidal lamps to emit a safe form of ultraviolet light called Far-UVC to sanitize hard-to-reach areas in subway trains, classrooms, restaurants and offices in another attempt to control the spread of COVID-19.
https://www.fierceelectronics.com/electronics/how-far-uvc-germkiller-robot-will-battle-covid-19