28-11-2021, 09:33
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#8418
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laeva recumbens anguis
Cable Forum Team
Join Date: Jun 2006
Age: 68
Services: Premiere Collection
Posts: 43,758
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Re: Coronavirus
Quote:
Originally Posted by OLD BOY
Quite. I just demonstrates these measures are just to show the government is doing something.
Most thinking people know that masks are next to useless.
---------- Post added at 02:09 ---------- Previous post was at 02:07 ----------
And from you, pessimism, hopeless pessimism.
Any update on when the end of the world will be upon us?
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That assertion is not evidence-based - science shows otherwise.
https://www.pnas.org/content/118/4/e2014564118
Quote:
Our review of the literature offers evidence in favor of widespread mask use as source control to reduce community transmission: Nonmedical masks use materials that obstruct particles of the necessary size; people are most infectious in the initial period postinfection, where it is common to have few or no symptoms (45, 46, 141); nonmedical masks have been effective in reducing transmission of respiratory viruses; and places and time periods where mask usage is required or widespread have shown substantially lower community transmission.
The available evidence suggests that near-universal adoption of nonmedical masks when out in public, in combination with complementary public health measures, could successfully reduce Re
to below 1, thereby reducing community spread if such measures are sustained. Economic analysis suggests that mask wearing mandates could add 1 trillion dollars to the US GDP (32, 34).
Models suggest that public mask wearing is most effective at reducing spread of the virus when compliance is high
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https://www.bmj.com/content/bmj/375/...68302.full.pdf
Quote:
Mask wearing and covid-19 incidence—Six studies with a total of 2627 people with covid-19 and 389228 participants were included in the analysis examining the effect of mask wearing on incidence of covid-19 (table 1).36 43 57 60 63 66 Overall pooled analysis showed a 53% reduction in covid-19 incidence (0.47, 0.29 to 0.75), although heterogeneity between studies was substantial (I2=84%) (fig 5). Risk of bias across the six studies ranged from moderate36 57 60 66 to serious or critical43 63 (fig 2).
Mask wearing and transmission of SARS-CoV-2, covid-19 incidence, and covid-19 mortality— The results of additional studies that assessed mask wearing (not included in the meta-analysis because of substantial differences in the assessed outcomes) indicate a reduction in covid-19 incidence, SARS-CoV-2 transmission, and covid-19 mortality. Specifically, a natural experiment across 200 countries showed 45.7% fewer covid-19 related mortality in countries where mask wearing was mandatory (table 1).49 Another natural experiment study in the US reported a 29% reduction in SARS-CoV-2 transmission (measured as the time varying reproductive number Rt) (risk ratio 0.71, 95% confidence interval 0.58 to 0.75) in states where mask wearing was mandatory.58
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Last edited by Hugh; 28-11-2021 at 09:40.
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