Good circulation definitely helps, but it's not a panacea, unless very well designed. I recall a case from the early covid days where contact tracing showed a b

Good circulation definitely helps, but it's not a panacea, unless very well designed. I recall a case from the early covid days where contact tracing showed a bunch of people catching it in a restaurant; it turned out what they had in common is that they were all downwind of the carrier from the relevant HVAC vent. Some restaurants retrofitted fancy setups with individual vents or even partial center enclosures for each table, but obviously that gets quite expensive, especially compared to a UV bulb. I do generally agree with you though that proper circulation and filtration can be very beneficial in limiting spread of pathogens.