Viruses are not just viruses, they are contained within moist droplets and on particulate. Also, VOC [such as the Banana oil test] are molecular and very small vs even raw virus not contained in droplets or attached to particulate. The cited study regarding mandated mask-wearing is a bit scrambled, perhaps at the intervention of the Trump Administration filtration.
https://www.nytimes.com/2020/07/14/us/politics/trump-cdc-coronavirus.htmlThe originals cited study page 1, deals with the
effectiveness of the state mandates of mask use and not how effective the masks are. There is a difference... people do not use masks if mandated and certainly not when eating or drinking.
https://www.cdc.gov/mmwr/volumes/70/wr/mm7010e3.htm"Only one observational study has
directly analyzed the impact of mask use in the community on COVID-19 transmission. The study looked at the reduction of secondary transmission of SARS-CoV-2 in Beijing households by face mask use (10).
It found that face masks were 79% effective in preventing transmission, if they were used by all household members prior to symptoms occurring. "
https://www.pnas.org/content/118/4/e2014564118#sec-2 PNAS January 26, 2021 118 (4) e2014564118;
https://doi.org/10.1073/pnas.2014564118Edited by Lauren Ancel Meyers, The University of Texas at Austin, Austin, TX, and accepted by Editorial Board Member Nils C. Stenseth December 5, 2020 (received for review July 13, 2020)
"Results The secondary attack rate in families was 23.0% (77/335). Face mask use by the primary case and family contacts before the primary case developed symptoms was
79% effective in reducing transmission (OR=0.21, 95% CI 0.06 to 0.79). Daily use of chlorine or ethanol based disinfectant in households was 77% effective (OR=0.23, 95% CI 0.07 to 0.84). Wearing a mask after illness onset of the primary case was not significantly protective. The risk of household transmission was 18 times higher with frequent daily close contact with the primary case (OR=18.26, 95% CI 3.93 to 84.79), and four times higher if the primary case had diarrhoea (OR=4.10, 95% CI 1.08 to 15.60). Household crowding was not significant." A scientific study.
https://gh.bmj.com/content/5/5/e002794.long"Multi-layer cloth masks block release of exhaled respiratory particles into the environment,3-6 along with the microorganisms these particles carry.7,8 Cloth masks not only effectively block most large droplets (i.e., 20-30 microns and larger)9 but they can also block the exhalation of fine droplets and particles (also often referred to as aerosols) smaller than 10 microns ;3,5 which increase in number with the volume of speech10-12 and specific types of phonation.13 Multi-layer
cloth masks can both block up to 50-70% of these fine droplets and particles3,14 and limit the forward spread of those that are not captured.5,6,15,16 Upwards of 80% blockage has been achieved in human experiments that have measured blocking of all respiratory droplets,4 with cloth masks in some studies performing on par with surgical masks as barriers for source control.3,9,14
Quoted from the CDC
https://www.cdc.gov/coronavirus/2019-ncov/more/masking-science-sars-cov2.htmlViruses are not just viruses, they are contained w... (