Far-UVC (222 nm) efficiently inactivates an airborne pathogen in a room-sized chamber

“A new type of ultraviolet light that is safe for people took less than five minutes to reduce the level of indoor airborne microbes by more than 98%, a joint study by scientists at Columbia University Vagelos College of Physicians and Surgeons and in the U.K. has found. Even as microbes continued to be sprayed into the room, the level remained very low as long as the lights were on.”

Read paper.
2018 paper.