Here's a fascinating Twitter thread about the history of aerosol transmission denial in the medical community, going back to the early 20th century :

https://twitter.com/jljcolorado/status/1391111720526024708?s... (It's 100 tweets long, here's a more readable version : https://threadreaderapp.com/thread/1391111720526024708.html)

The tl;dr is that 20th century health authorities went too far in their rejection of the 19th century "miasma" theory of disease transmission, and now the pendulum is swinging back again.