[MCOH-EH] Question re: Mask studies

Natalie Hartenbaum natah at comcast.net
Sat Jul 11 14:31:19 PDT 2020
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Actually the risk may be reduced but CDC advises that the use of a face covering should not modify the definition of a close contact

> On Jul 11, 2020, at 5:14 PM, Natalie Hartenbaum <natah at comcast.net> wrote:
> 
> NO!. CDC advises that;
> Individual who has had close contact (< 6 feet)** for ≥15 minutes***
> Person with COVID-19 who has symptoms <https://www.cdc.gov/coronavirus/2019-ncov/symptoms-testing/symptoms.html>(in the period from 2 days before symptom onset until they meet criteria for discontinuing home isolation <https://www.cdc.gov/coronavirus/2019-ncov/hcp/disposition-in-home-patients.html>; can be laboratory-confirmed or a clinically compatible illness)
> Person who has tested positive for COVID-19 (laboratory confirmed) but has not had any symptoms <https://www.cdc.gov/coronavirus/2019-ncov/symptoms-testing/symptoms.html> (in the 2 days before the date of specimen collection until they meet criteria for discontinuing home isolation <https://www.cdc.gov/coronavirus/2019-ncov/hcp/disposition-in-home-patients.html>).
> Note: This is irrespective of whether the person with COVID-19 or the contact was wearing a cloth face covering or whether the contact was wearing respiratory personal protective equipment (PPE)
> 
> 
> 
>> On Jul 10, 2020, at 1:54 PM, PRATER, DEANNA <deanna.prater at bayareahospital.org <mailto:deanna.prater at bayareahospital.org>> wrote:
>> 
>> CDC defines exposure risk of being within 6 feet for 15 minutes or more.  If all parties are wearing masks, the exposure risk is reduced.
>>  
>> From: MCOH-EH <mcoh-eh-bounces+deanna.prater=bayareahospital.org at mylist.net <mailto:mcoh-eh-bounces+deanna.prater=bayareahospital.org at mylist.net>> On Behalf Of Thanassi, Wendy via MCOH-EH
>> Sent: Friday, July 10, 2020 10:22
>> To: deecre1 at cox.net <mailto:deecre1 at cox.net>; MCOH-EH <mcoh-eh at mylist.net <mailto:mcoh-eh at mylist.net>>; Dr.Runde <Dr.Runde at Roep.org <mailto:Dr.Runde at Roep.org>>
>> Cc: Thanassi, Wendy <Wendy.Thanassi at va.gov <mailto:Wendy.Thanassi at va.gov>>
>> Subject: [MCOH-EH] Question re: Mask studies
>>  
>> CAUTION: This email originated outside of Bay Area Hospital. Do not click links or open attachments unless you recognize the sender and know the content is safe.
>>  
>> I hope this question isn’t foolish: I am advising local schools and want to make sure I have this right.
>>  
>> I have reviewed the Lancet article, good but limited as all meta-analyses are by the variety of studies and quality of those reports.
>>  
>> Would someone clarify the physical distancing (we should advocate for that language rather than social distancing, whatever that is) benefits at 1m vs. 2m vs. more… are those analyzed when both parties are wearing masks? Or are they without masks? I assume the latter but am not sure.
>>  
>> Are there any studies you’re aware of regarding physical distance efficacy with dual mask use?
>>  
>> Thanks,
>> Wendy
>>  
>> Wendy Thanassi MA, MD, MRO
>> Chief, Occupational Health Service
>> Palo Alto VA HCS
>> 650-714-6151
>>  
>> Associate Clinical Professor
>> Emergency Medicine and Population Health
>> Stanford Medical Center and Hospitals
>>  
>> From: MCOH-EH <mcoh-eh-bounces+wendy.thanassi=va.gov at mylist.net <mailto:mcoh-eh-bounces+wendy.thanassi=va.gov at mylist.net>> On Behalf Of deecre1 at cox.net <mailto:deecre1 at cox.net>
>> Sent: Wednesday, July 8, 2020 3:01 PM
>> To: MCOH-EH <mcoh-eh at mylist.net <mailto:mcoh-eh at mylist.net>>; Dr.Runde <Dr.Runde at Roep.org <mailto:Dr.Runde at Roep.org>>
>> Subject: [EXTERNAL] Re: [MCOH-EH] Mask studies
>>  
>> Thank you for posting this article! It will help explain the benefit of using masks! Diane Doyker
>> 
>> 
>> On July 8, 2020 at 4:32 PM "Swift, Melanie D., M.D., M.P.H. via MCOH-EH" <mcoh-eh at mylist.net <mailto:mcoh-eh at mylist.net>> wrote:
>> 
>> https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31142-9/fulltext <https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31142-9/fulltext>
>>   
>>   
>> Melanie
>>   
>> Melanie Swift, MD, MPH
>> Medical Director, Mayo Clinic Physician Health Center <https://www.mayoclinic.org/departments-centers/preventive-occupational-aerospace-medicine/physician-health-center/referrals>
>> Associate Medical Director, Occupational Health Service
>> Senior Associate Consultant 
>> Assistant Professor of Medicine 
>> Division of Preventive, Occupational, and Aerospace Medicine
>> Phone 507.284.2560 
>> _______________________________
>> Mayo Clinic
>> 200 First Street SW
>> Rochester, MN 55905
>> www.mayoclinic.org <http://www.mayoclinic.org/>
>>   
>> From: bounce-41917527-96363825 at listserv.unc.edu <mailto:bounce-41917527-96363825 at listserv.unc.edu> [mailto:bounce-41917527-96363825 at listserv.unc.edu <mailto:bounce-41917527-96363825 at listserv.unc.edu>] On Behalf Of Dr.Runde
>> Sent: Wednesday, July 8, 2020 3:28 PM
>> To: Swift, Melanie D., M.D., M.P.H.
>> Subject: [EXTERNAL] [occ-env-med-l] Mask studies 
>>   
>> I have had people asking me about good, solid, scientific studies on either side of the question whether to wear a mask or not.  Does anybody have good quality studies they could recommend?
>> Thanks, 
>>   
>> Eddie W. Runde, MD, MPH, FACOEM
>> Board-certified in Occupational Medicine
>> ROEP, PC
>> Columbia, MO
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> ---------------------------------------
> The MCOH-EH List has always been moderated by members of the ACOEM Medical Center Occupational Health Section. It is currently moderated by Joe Fanucchi MD FACOEM.
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