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?





Wendy Thanassi MA, MD, MRO

Chief, Occupational Health Service

Palo Alto VA HCS



Associate Clinical Professor

Emergency Medicine and Population Health

Stanford Medical Center and Hospitals


From: MCOH-EH <mcoh-eh-bounces+wendy.thanassi=va.gov@mylist.net> On Behalf Of deecre1@cox.net
Sent: Wednesday, July 8, 2020 3:01 PM
To: MCOH-EH <mcoh-eh@mylist.net>; Dr.Runde <Dr.Runde@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@mylist.net> wrote:






Melanie Swift, MD, MPH
Medical Director, Mayo Clinic Physician Health Center

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


From: bounce-41917527-96363825@listserv.unc.edu [mailto:bounce-41917527-96363825@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?



Eddie W. Runde, MD, MPH, FACOEM

Board-certified in Occupational Medicine


Columbia, MO

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