Aerosols are particles of saliva or breathing fluid. They are created when we speak, scream, sing, cough, sneeze or simply breathe. Because of their small size - the particles are smaller than 1 micrometer (μm) - aerosols can stay in the air for several minutes or hours and travel longer distances. By inhaling infectious aerosols, the infection does not occur in the eye, mouth and throat area as usual, but deep in the lungs.
UVC systems for air disinfection are effective against aerosol infections. The ventilation systems attract the room air and inactivate up to 99.9% of all airborne micro-organisms. The inactivated viruses also include the pandemic pathogen SARS-CoV-2.