Here’s a nonsense article from SCRIPPS that does a pretty good job of corralling what we know of viral infection and aerosol spread:

“The majority of aerosols produced by respiratory activities are smaller than 5 µm, which allows them to travel deep into the bronchiolar and alveolar regions and deposit there. Studies find that viruses are more enriched in aerosols smaller than 5 µm,” said Josué Sznitman, a pulmonary physiologist of Technion, Israel.

IT’S NOT JUST SARS-COV-2: MOST RESPIRATORY VIRUSES SPREAD BY AEROSOLS

We can have a symantic debate all day between droplets vs aerosol. How about we agree that Covid is airborne and air quality is a major factor for its spread

If you can wrap your head around that, you have public health policy implications. I see very little here other than vaxvaxvax and a few drugs to help with the infection. Not so much for mitigating the chance of infection, My suspicion is not enough profit in that direction.