The authors of this study create a Fluid Flow model to simulate the dispersion of air borne particles including C19. Somewhat interesting but from a health stand point meaningless. The authors made a basic flaw by not distinguishing between active and de-activated viruses. In the presence of sunlight, multiple studies have shown that the virus de-activates in as little as 1-3 minutes. They do not distinguish as well, it seems, between large droplets containing C19 which tend to fall to the ground and smaller ones that become airborne. Its the former that are far more dangerous because of the viral load. How can I directly contact the authors. I'm sure they'd be willing to update their study. lol