Good summary. I’d like to clarify that the source of the original confusion was the 100 micron threshold for falling out of the air being conflated with the 5 micron threshold of tuberculosis infection decades ago. So the WHO believed SARS-CoV-2 droplets would fall onto surfaces because they were larger than 5 microns, but in actual fact they would remain suspended in the air. That’s why preventative mask advice only became well-known several months into the pandemic.