The possibility of aerosol transmission of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) remains controversial. An aerosol is defined as a suspension of particles of <5 μm in the air (or in a gas), which is small enough to reach the respiratory bronchioles and alveoli (Wilson et al., 2020). The WHO merely acknowledged that aerosol transmission might be another transmission route for SARS-CoV-2 without further response, and international and governmental guidelines retain the rule of 2 m of social distance based on droplet transmission (Morawska and Milton, 2020; Wilson et al., 2020).
