New study, sponsored in part by IATSE Local 891, shows that artificial fog may even reduce levels of suspended respiratory aerosols.

Artificial fog is used in the film, television, and live entertainment industries to enhance lighting, as a visual effect, and to create a specific sense of mood or atmosphere. This study, carried out by Matthew Loss, Mark Katchen, Ilan Arvelo, Phil Arnold, and Mona Shum, investigated whether the suspension time of respiratory aerosols spiked with tagged DNA tracers would change in the presence of glycerin- or glycol-containing artificial fogs.

COVID-19 Implications of the Physical Interaction of Artificial Fog on Respiratory Aerosols..