Little Evidence Supports Use of Cloth Masks to Limit Spread of Coronavirus: Analysis
Cloth masks are of little use against COVID-19, according to a recently published analysis.
While federal health authorities and a slew of jurisdictions require or recommend wearing masks as a way to limit the spread of the virus that causes COVID-19, a trio of researchers pored over the studies often cited by the officials and found they were poorly designed and offered scant evidence in support of mask usage.
Many of the studies are observational, opening them up to confounding variables, the researchers said in their analysis (pdf), which was published on Nov. 8 by the Cato Institute.
But this was known when masks were first imposed, as was matter-of-factly alluded to in the NEJM in an article questioning the efficacy of universal masking even in health care facilities. While federal health authorities and a slew of jurisdictions require or recommend wearing masks as a way to limit the spread of the virus that causes COVID-19, a trio of researchers pored over the studies often cited by the officials and found they were poorly designed and offered scant evidence in support of mask usage.
Many of the studies are observational, opening them up to confounding variables, the researchers said in their analysis (pdf), which was published on Nov. 8 by the Cato Institute.
We know that wearing a mask outside health care facilities offers little, if any, protection from infection. Public health authorities define a significant exposure to Covid-19 as face-to-face contact within 6 feet with a patient with symptomatic Covid-19 that is sustained for at least a few minutes (and some say more than 10 minutes or even 30 minutes). The chance of catching Covid-19 from a passing interaction in a public space is therefore minimal. In many cases, the desire for widespread masking is a reflexive reaction to anxiety over the pandemic.
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It is also clear that masks serve symbolic roles. Masks are not only tools, they are also talismans that may help increase health care workers’ perceived sense of safety, well-being, and trust in their hospitals.
https://www.nejm.org/doi/full/10.1056/NEJMp2006372
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It is also clear that masks serve symbolic roles. Masks are not only tools, they are also talismans that may help increase health care workers’ perceived sense of safety, well-being, and trust in their hospitals.
https://www.nejm.org/doi/full/10.1056/NEJMp2006372
