Add CDC document about multi-layered cloth masks

ljl-covid · Jan 25, 2021 · ff1a34e · ff1a34e
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@@ -404,6 +404,7 @@ There is mixed advice on the use of masks by the general public, and the advice
 * [Face Masks for the General Public](https://rs-delve.github.io/reports/2020/05/04/face-masks-for-the-general-public.html) by the [Royal Society DELVE initiative](https://rs-delve.github.io/), answering many basic question on mask use, making, re-use, cleaning and appropriateness backed by a number of references
 * [Rational use of face masks in the COVID-19 pandemic](https://www.thelancet.com/journals/lanres/article/PIIS2213-2600\(20\)30134-X/fulltext), a review of mask-related advice from authorities published on The Lancet
 * [Risk of SARS-CoV-2 transmission by aerosols, the rational use of masks, and protection of healthcare workers from COVID-19](https://aricjournal.biomedcentral.com/articles/10.1186/s13756-020-00763-0) is more recent than the above and concludes that no mask type completely avoids transmission, but it's possible high-quality surgical masks may be as effective as FFP2 respirators
+* [Community Use of Cloth Masks to Control the Spread of SARS-CoV-2](https://www.cdc.gov/coronavirus/2019-ncov/more/masking-science-sars-cov2.html/) is a document by the CDC describing the espected benefits of mask wearing, especially multi-layered cloth masks for community use
 * [BBC: Coronavirus Expert panel to assess face mask use by public](https://www.bbc.com/news/science-environment-52126735) covers the WHO "reopening discussion" on the matter, and scientific literature on the aerosolization of cough and sneezes
 * [N95DECON](https://www.n95decon.org/), a scientific consortium for data-driven study of N95 filtering facepiece respirator decontamination
 * [Turbulent Gas Clouds and Respiratory Pathogen Emissions: Potential Implications for Reducing Transmission of COVID-19](https://jamanetwork.com/journals/jama/fullarticle/2763852), a paper published on JAMA on aerosolization and characteristics of respiratory emissions like coughs and sneezes