New Study Could Help Design UV-C Light-Based COVID-19 Disinfection Devices Written by AZoOpticsMar 10 2021 COVID-19 virus is primarily transmitted through airborne diffusion of saliva microdroplets. Hence, it is crucial to identify methods to destroy the virus in airborne microdroplets. In Physics of Fluids, Marche Polytechnic University researchers describe using a supercomputer to do numerical modeling of cough droplets irradiated by UV-C light: The red zone (from your chest down) is the area of highest risk, so while your face may only receive a few cough droplets, it is critical to wash your hands and keep them away from your face. Image Credit: V. D’Alessandro, M. Falone, L. Giammichele, and R. Ricci.