Is there a fundamental reason why UV doesn't work on air? Wouldn't a UV approach be much more energy efficient and rapidly scalable?
https://en.wikipedia.org/wiki/Ultraviolet_germicidal_irradia...
And our room IQAir HyperHEPA filter units go down to 0.003 microns, which is an order of magnitude smaller than virus particles.
But that only helps you at home, and it only helps you with those particles it captures before you breathe that air. If you’re between the air filter and the virus particles in question, then you’re more likely to be the filter that catches those particles.