If its wavelength is <230 nanometers, it doesn't damage human tissue, so you can keep the lights on when there are people around and sterilize the air.
COVID-19 is droplet-borne, so you need this more than you need surface sterilization.
Surely this should be valuable in the fight against COVID-19!
1. we have a PROBLEM.
2. somebody invents a way to SOLVE that problem.
3. other people sell things that sound similar but DON'T SOLVE THE PROBLEM. These imitators get more traction than the real solution.
maybe the buyers don't understand the problem well enough; maybe they aren't incentivized to actually solve the problem.
but otherwise you just look like a less-well-funded, not-necessarily-superior version of the other guys!
They're not naive; they see that the problem isn't gone. They think that's because it's unsolved or unsolvable.