1/ Complexity of Close Contact
Inhaled deposited dose of aerosol particles via close contact is difficult to model, even if two people stay facing each other at 4 - 6 feet apart, due to huge variations in emissions as well as dispersion of the plume between them.
Inhaled deposited dose of aerosol particles via close contact is difficult to model, even if two people stay facing each other at 4 - 6 feet apart, due to huge variations in emissions as well as dispersion of the plume between them.
2/ If the indoor space is a crowded event (e.g., wedding reception, bar, etc.) in which people move around, the complexity becomes even greater. How often does a person come in close contact with one or more infectors? What is the average contact time?
3/ I have been thinking back to my PhD dissertation (way back in the day) when I studied and applied surface renewal theory for gas transfer at interfaces where liquid-phase mass transfer dominates.
4/ "Packets" of liquid come to surface w/ frequency defined by mixing conditions, etc. Each packet stays at surface for a time period that can vary and be defined by a probability distribution. While at the surface chemicals can volatilize (transfer) from liquid to gas.
5/ Surface renewal theory is not unlike frequency of contact with infector, time spent in close contact, & transfer from infector to receptor resp systems.
My research dealt w/ volatilization of chemicals from raw sewage to overlying headspace in sewers. Someone had to do it!
My research dealt w/ volatilization of chemicals from raw sewage to overlying headspace in sewers. Someone had to do it!
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