"In short, aerosols (<5 μ m) containing HCoV-19 (105.25 69 TCID50/mL) or SARS-CoV-1 (106.75-7 TCID50/mL) were generated using a 3-jet Collison nebulizer and fed into a Goldberg drum to create an aerosolized environment. Aerosols were maintained in the Goldberg drum and samples were collected at 0, 30, 60, 120 and 180 minutes post-aerosolization on a 47mm gelatin filter (Sartorius). Filters were dissolved in 10 mL of DMEM containing 10% FBS. Three replicate experiments were performed."
I looked up "Goldberg drum" and found this https://www.researchgate.net/figure/Aerosol-apparatus-A-40-L... which looks pretty small. It would dissipate a lot more in a room, and even more outdoors. How can we account for the effects of dissipation?