See:


Can UV Light Be Used to Kill Airborne Flu Virus? - WebMD


“MONDAY, Feb. 12, 2018 (HealthDay News) – As a particularly nasty
flu season rages across the United States, scientists have found a powerful new disinfectant that makes “light” work of the virus.”


The article goes on to note:


“Though hand-washing remains critically important, it does not prevent every instance of transmission,” Grosso said. “Immunization and antiviral medications are also important, but again, have limitations. It appears that low-dose far-UV light is safe and effective, and has the advantage of inactivating a wide range of disease-causing viruses.”


JWK