lostsparks,
yes I saw discussions of UV early on at ASHREA and other places, but I did not see a lot of follow up with that. Is this being used in practice? Does it need to be installed inside HVAC? is it a big job? Any precautions so it is not directed towards people?
In most cases, opening doors/windows helps a lot. In some small rooms with no windows, add a stand alone air purifier. I think some of them are UV.