Aerosolization is the process or act of converting a physical substance into particles that are small and light enough to be carried in the air, that is, into an aerosol.
Cough, sneezing, talking.
Yes, transmission of covid can occur via very fine droplet aerosols. A simple breath is enough for its propagation.
Case studies of asymptomatic COVID-19 transmission reveal that primary "functions" such as breathing or talking ... produce small droplets that can be airborne. These aerosol particles produced by speaking and breathing are so small that they linger in the air for relatively long periods of time before gravity brings them back to the ground. They are thus airborne over greater distances.
Barrier gestures are more relevant than ever in all circumstances.