DCHAS-L Archives, Aug 05 2020 - Re: [DCHAS-L] Clear masks for teaching?

I just downloaded Lednicky, et all on aerosols in hospital air. Oy. here's the link and the conclusion

medRxiv preprint doi: https://doi.org/10.1101/2020.08.03.20167395

conclusion

"Our findings reveal that viable SARS-CoV-2 can be present in aerosols generated by a COVID-19 patient in a hospital room in the absence of an aerosol-generating procedure, and can thus serve as a source for transmission of the virus in this setting. Moreover, the public health implications are broad, especially as current best practices for limiting the spread of COVID-19 center on social distancing, wearing of face-coverings while in proximity to others and hand-washing. For aerosol-based transmission, measures such as physical distancing by 6 feet would not be helpful in an indoor setting, provide a false-sense of security and lead to exposures and outbreaks. With the current surges of cases, to help stem the COVID-19 pandemic, clear guidance on control measures against SARS-CoV-2 aerosols are needed, as recently voiced by other scientists."

Monona

-----Original Message-----
From: Nicole Grasso <nicole.willard**At_Symbol_Here**GMAIL.COM>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Tue, Aug 4, 2020 8:54 pm
Subject: Re: [DCHAS-L] Clear masks for teaching?

Hi Tammy,

As these are meant as a substitute for cloth face covers (and not PPE) we tried these for a hearing-impared team lead:

https://www.etsy.com/listing/810797515/face-mask-w-vinyl-window-reusable-face?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=clear+mask&ref=sr_gallery-1-11&organic_search_click=1&frs=1&bes=1&col=1

but they eventually formed a vacuum and sucked into the wearer's face.

We then tried these:

https://buy.theclearmask.com/collections/frontpage/products/clearmask-box

The team loved them. I'm not sure if they are disinfecting them or disposing. If you are interested, I can follow up with the team.

Regards,

Nicole

On Tue, Aug 4, 2020 at 8:21 PM <pzavon**At_Symbol_Here**rochester.rr.com> wrote:

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.

https://www.goodhousekeeping.com/health/g33471599/best-clear-face-masks/

-Tammy Rechtin

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