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I would be most skeptical of #3, despite the claim of “FDA approval”. It looks like it has almost NO filtering material at all.
Peter Zavon, CIH
Penfield, NY
PZAVON**At_Symbol_Here**Rochester.rr.com
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Tammy M. Lutz-Rechtin
Sent: Tuesday, August 4, 2020 5:11 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Clear masks for teaching?
What does everyone think about the use clear window masks for teaching? We want to be safe and increase effective communication.
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