The screw-up the title refers to is that the medical definition of the droplet/aerosol threshold has been wrong for most of a century, and the source only just tracked down in late 2020/early 2021.
Also buried in there is an interesting tidbit that experts resist aerosol spread in general because it's too similar to the long-discredited miasma theory, so each virus has had to individually be proven in a lab to have aerosol spread before it's acceptable to say so.
The screw-up the title refers to is that the medical definition of the droplet/aerosol threshold has been wrong for most of a century, and the source only just tracked down in late 2020/early 2021.
Also buried in there is an interesting tidbit that experts resist aerosol spread in general because it's too similar to the long-discredited miasma theory, so each virus has had to individually be proven in a lab to have aerosol spread before it's acceptable to say so.