There are several knowledge gaps that explains a lack of knowledge on minimum ventilation rates for intercepting airborne respiratory infection. One is a lack of unifying understanding of the roles of ventilation, filtration, settling, deactivation, and most importantly temporal and spatial variation. A recent finding on the equivalence of the occupied air volume per person and dilution and a generalized Wells-Riley equation are used to define a unified dilution air flow rate. The required threshold dilution air flow rate is not a function of the setting. I would suggest the use of the dilution air flow rate not the ventilation air flow rate for infection control.
