See CDC's page on re-use guidelines. Enlightening for everyone who needs a mask and anyone who may need a hospital in the near future.

https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirators-strategy/contingency-capacity-strategies.html

Thanks,
Yaritza Brinker
260-827-5402

-----Original Message-----
From: ACS Division of Chemical Health and Safety On Behalf Of Monique Wilhelm
Sent: Monday, March 23, 2020 3:09 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] COVID-19 Question

** External Email **

A friend who is a surgical nurse has explained to me that they are using the cloth masks to cover their N-95s so that they can remove the cover mask and replace if there is a noticeable splatter incident, thereby making the N-95 masks effective for a longer period. They are then reusing the N-95 without specific instruction for storage....she asked me how to store. I have no answer.

Monique

_________________________________________________________

Monique Wilhelm, M.S., NRCC Certified CHO

ACS CHAS Secretary|2017 CERM E. Ann Nalley Award Recipient

Laboratory Manager|Adjunct Lecturer|Chemistry Club Advisor

Department of Chemistry & Biochemistry|University of Michigan-Flint

Emaill: mwilhelm**At_Symbol_Here**umich.edu

Monique

_________________________________________________________

Monique Wilhelm, M.S., NRCC Certified CHO

ACS CHAS Secretary|2017 CERM E. Ann Nalley Award Recipient

Laboratory Manager|Adjunct Lecturer|Chemistry Club Advisor

Department of Chemistry & Biochemistry|University of Michigan-Flint

Emaill: mwilhelm**At_Symbol_Here**umich.edu

On Mon, Mar 23, 2020 at 3:03 PM Lawrence M Gibbs wrote:
>
> Hi Tried sending this with document attached but was rejected by site.
> So am placing a link here that I hope will get one to the site of the
> same document: Final Report for the Bioquell Hydrogen Peroxide Vapor
> (HPV) Decontamination for Reuse of N95 Respirators
>
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwayba
> ck.archive-it.org%2F7993%2F20170113034232%2Fhttp%3A%2F%2Fwww.fda.gov%2
> Fdownloads%2FEmergencyPreparedness%2FCounterterrorism%2FMedicalCounter
> measures%2FMCMRegulatoryScience%2FUCM516998.pdf&data=02%7C01%7C%7C
> 941e60bbd5cf4e5c521908d7cf5e8fa8%7C994c3e8bb42845fb8640593ef0303f7f%7C
> 0%7C1%7C637205877353671755&sdata=W6RqS3Cj%2FIiU06lfDhQskM3nyR7fDgZ
> iG4aFpy4%2FyrE%3D&reserved=0
>
>
>
> From: Lawrence M Gibbs
> Sent: Monday, March 23, 2020 11:04 AM
> To: neal**At_Symbol_Here**CHEMICAL-SAFETY.COM; DCHAS-L**At_Symbol_Here**PRINCETON.EDU
> Subject: RE: [DCHAS-L] COVID-19 Question
>
>
>
> Neal et al,
>
>
>
> Keep in mind particulate filtering respirators were developed primarily for inert particulate matter (wood dust, silica, etc.). When used in a clinical setting, the particulate matter is no longer inert, but potentially can replicate and infect individuals upon exposure (uptake). For this reason, reuse of an N-95 is not typically recommended for use in biohazard protection, as a general rule.
>
>
>
> Having said that we are entering that stage of an emergency where scarcity of the primary protective device is occurring. A number of academic clinical centers are running into the same issues and are doing some testing of methodologies for possible reuse of n-95 particle respirators. The attached is one such report on methodology for disinfection of the masks for possible reuse. Note that gas or vapor is needed to assure complete penetration of the filtrate substrate where infectious particulates may adhere. Work is currently being done by some of the regional academic bio research facilities on this and protocols being developed demonstrating the process and testing using indicator strips of the disinfection. I suggest caution on applying considerations for non-viable particulates to the current situation for N-95s or other respiratory protective equipment.
>
>
>
> Larry
>
>
>
> Lawrence M. Gibbs, CIH, FAIHA
>
> Associate Vice Provost Emeritus
>
> Stanford University
>
> lgibbs**At_Symbol_Here**stanford.edu
>
> (c) 650-387-1131
>
>
>
>
>
>
>
> From: ACS Division of Chemical Health and Safety
> On Behalf Of NEAL LANGERMAN
> Sent: Monday, March 23, 2020 10:23 AM
> To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
> Subject: [DCHAS-L] COVID-19 Question
>
>
>
> All
>
> What do you say to a healthcare provider (assume they are in your core family) who has been told to ration N95 masks. Told to reuse them.
>
> Healthcare provider wants to know about sanitizing them; about effectiveness; about building their own mask.
>
> FYI, here is some NIH published data:
>
>
>
> Reduction to exposure by virus-like particulates. Based on article
> published by NIH
>
> Mask Type % reduction of particulates
>
> N95 99
>
> SURGICAL MASK 74
>
> HOMEMADE TEA CLOTH MASK 58
>
>
>
> Also, the Elan Musk companies delivered 50,000 N95 masks to a hospital today.
>
>
>
> nl
>
>
>
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