CDC recommends Ultraviolet Germicidal Irradiation (UVGI)
CDC is the Centers for Disease Control and Prevention is the national public health agency of the United States. It is a United States federal agency, under the Department of Health and Human Services

Ultraviolet germicidal irradiation, or UVGI, is the use of ultraviolet (UV) energy to kill viral, bacterial, and fungal organisms. UVGI fixtures produce UV-C energy, which has shorter wavelengths than more penetrating UV-A and UV-B rays and pose less risk to human health. (CDC,2021)
UVGI and SARS-CoV-2
Upper-room UVGI has been used for over 70 years to eliminate airborne pathogens. Since 1950, the bulk of the research on upper-room UVGI systems focused on controlling the spread of tuberculosis (TB). (CDC,2021)