Here is the link to the recording of a webinar I gave for the Leeds School of Business at CU Boulder.  It was a 25-min presentation touching on aerosol transmission of COVID-19 and control strategies to reduce transmission, especially focused on indoor environments. In addition to masks and social distancing I touch on engineering controls (ventilation, filtration, germicidal UV) that can be added to our suite of strategies for reducing transmission risk of COVID-19.