Most people, including the CDC, have been making all their guidance on assumptions that primary transmission is from large droplet entrainment of particulate which has never made sense to me. And the fact that clusters been in cruise ships,
meat packing plants and choir rooms where people are in close prolonged contact in poorly ventilated areas points to spread by aerosolization. While HEPA filters or filters with MERV ratings of 15 or greater with an increase of outside air intake is not
an absolute cure all it certainly would be a good place to begin to reduce the concentration of active virus particulate in the air, then address distancing and maximum number of people in a room.
Alicia
Frazier | 19100 Ridgewood Parkway | San Antonio, TX 78259
Direct: 210-626-6615 | Mobile: 210-412-3253
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Pam Auburn
Sent: Friday, July 31, 2020 3:30 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [EXTERNAL] [DCHAS-L] Atlantic Article on Ventilation
I am certainly not an expert on this subject and have been thinking about it as we plan for a limited return to campus
This piece certainly did not "clear it up" but did placed some of the arguments in perspective
2041 Branard
Houston TX 77098
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
