Airborne disease transmission in a well-mixed room Drop-size distributions
so now we've included all the key physics in our model uh sedimentation deactivation of virus filtration of the air ventilation flows and now we have to include one last piece of information which is that all of those quantities or many of them that we've discussed have a dependence on the size of the droplets and the size of the droplets and number of the droplets is a strong function of the type of respiration which is being performed by the infected person in spewing out or emitting these droplets and also the respiration of the susceptible person who's breathing those droplets in so here is a sketch of what droplet distributions look like that have been measured for different kinds of expiratory activities so this is shown kind of on a log scale at least what i'm attempting to sketch so the dash the dotted line here roughly speaking is separating the aerosol droplets which are less than several microns in radius and the large droplets which are bigger ...