Hundreds of epidemiologists from around the world (WHO) asserting that people can contract SARS-CoV-2 infection from airborne virions -- free virus particles floating in the air, as distinct from aerosol droplets. In this exclusive ֱ video, David Aronoff, MD, of Vanderbilt University Medical Center in Nashville, reviews what we know about COVID-19 transmission dynamics, and what types of research could help pinpoint the spread of the virus in the future.