Fig. 11.

Monte-Carlo model A based estimates on aerosol particle number density in a generic 100 m by 100 m area at $t=60$ minutes when 0.5% of the population is infected. (a) 10,000 persons in the area – no coughing persons. (b) Only 800 persons reside in the area - coughing persons. All infected are shown (red) while only part of the susceptible persons (green) are shown for better visibility. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)