Lest there be any confusion at all, this is an excerpt from a 1980s article citing back to the 1930s/40s that measles was proven to be in the air. So no, this is not new. And in relation to coronaviruses, animal coronas were known to be in the air, and SARS and MERS suspected
And of course this needs to be reflected in HCW precautions, which still reflect droplet + N95 for aerosol-generating procedures only