Data doesn't back up wearing masks in public amid coronavirus pandemic
This claim has already been repeatedly debunked. Pretending the debunk doesn't exist doesn't make it or the evidence go away. Copy, paste, repeating my past posts and what I already said;
Face masks: what the data say
The science supports that face coverings are saving lives during the coronavirus pandemic,
Evidence for Effectiveness of Masks
...emerging evidence from clinical and laboratory studies that shows masks reduce the spray of droplets when worn over the nose and mouth.
...There are numerous studies that suggest if 80% of people wear a mask in public, then COVID-19 transmission could be halted.
...laboratory and epidemiological evidence...
By far, the strongest evidence for mask-wearing can be found in real-world data or so-called epidemiologic data. Leffler and colleagues analysed data on demographics, testing, lockdowns, and the public wearing of masks from 196 countries and found that countries with cultural norms or government policies supporting public mask-wearing had much lower per-capita mortality rates (1)
Another study from Germany reported that face masks reduced the number of newly registered SARS‐CoV‐2 infections by between 15 and 75 per cent over a 20-day period after their mandatory introduction (2). Overall, the authors estimate that face masks reduce the daily growth rate of reported infections by around 47 per cent.
The general consensus seems to be that masks – even, simple cloth ones – while clearly not foolproof can significantly slow the spread of the virus and reduce deaths
(1) Leffler, C.T. et al. Association of country-wide coronavirus mortality with demographics, testing, lockdowns, and public wearing of masks. Update August 4, 2020. medRxiv (2020). DOI: 10.1101/2020.05.22.20109231
(2) Mitze, T. et al. Face Masks Considerably Reduce Covid-19 Cases in Germany: A Synthetic Control Method Approach. IZA Discussion Paper No. 13319 (2020). Available at SSRN: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3620634
(3) Fischer, E.P. et al. Low-cost measurement of facemask efficacy for filtering expelled droplets during speech. Science Advancese (2020). DOI: 10.1126/sciadv.abd3083
(4) Simha, P.P. and Rao, P.S.M. Universal trends in human cough airflows at large distances featured. Physics of Fluids (2020). DOI: 10.1063/5.0021666
(5) Sickbert-Bennett, E.E. et al. Filtration Efficiency of Hospital Face Mask Alternatives Available for Use During the COVID-19 Pandemic. JAMA Internal Medicine (2020). DOI:
Face Masks Really Do Matter. The Scientific Evidence Is Growing.
Face masks are emerging as one of the most powerful weapons to fight the new coronavirus, with growing evidence that facial coverings help prevent transmission
The research Dr. Redfield cited included a recently published study suggesting that universal use of surgical masks helped reduce rates of confirmed coronavirus infections among health-care workers at the Mass General Brigham health-care system in Massachusetts.
Researchers from around the world have found many different kinds of masks can significantly reduce the spread of coronavirus,
Their findings largely align with other recently published research.
Facemasks slow spread of coronavirus by 40 per cent, study shows
The above shows the data shows wearing masks slows the coronavirus spread.
That data also shows any study that didn't find it didn't find it because it simply didn't look at the data that shows wearing masks slows the coronavirus spread but rather is flawed and/or just lying for political reasons and/or just looked at some other data that happened to be relevant because it does nothing to invalidate the data that DOES show it slows the stread.
Not looking at the data doesn't make it or the evidence go away. The data that shows wearing masks slows the coronavirus spread is plain to see and has been mentioned in the above links.