As I stated on another thread yesterday. “I’m a bit of an aerosol expert and a particle .08 microns in diameter can stay aloft for a very long time. Even if it is initially in a fluid state, any sneeze, [or cough] or projectile vomit will immediately make particulate of that size airborne indefinitely.”
I am pretty sure. Well...
To your point - "airborne" should mean aerosolized where you can have a viable virus suspended in the air for dozens of minutes and available for inhalation.
Coughs and sneezes produce 99.999% "sprays" where even those ~1 micron particles will settle within a minute. In any case I bought N95 masks and will start carrying those around in my briefcase.