The Barbarian
Crabby Old White Guy
- Apr 3, 2003
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This has been the mantra but I want everyone here to notice that when ever someone says this, governors or anonymous people on the internet, they don't provide the "research".
Here you go:
effectiveness of masks covid - Search Results - PubMed
Just under a thousand hits. Lots of research. In the literature, not some politically-motivated blog.
Masks merely reduce the amount of virus a person breathes out, trapping it in the cloth. And it happens by adhesion to fibers.
No evidence.
In a study by Milton et al. [24], they have investigated the effects of using surgical masks in preventing the aerosols influenza transmission. The obtained results indicated that surgical masks had prevented the viral detection aerosols by 25-fold for the coarse aerosols, and 2.5-fold for the fine particles, hence, generally 3.4-fold reduction was reported for the exhaled aerosols. In consequence, the surgical masks can limit the release of the droplets larger than 5 μm.
An overview of filtration efficiency through the masks: Mechanisms of the aerosols penetration - ScienceDirect
We collected samples of exhaled particles (one with and one without a facemask) in two size fractions (“coarse”>5 µm, “fine”≤5 µm) from 37 volunteers within 5 days of seasonal influenza onset, measured viral copy number using quantitative RT-PCR, and tested the fine-particle fraction for culturable virus.
Fine particles contained 8.8 (95% CI 4.1 to 19) fold more viral copies than did coarse particles. Surgical masks reduced viral copy numbers in the fine fraction by 2.8 fold (95% CI 1.5 to 5.2) and in the coarse fraction by 25 fold (95% CI 3.5 to 180). Overall, masks produced a 3.4 fold (95% CI 1.8 to 6.3) reduction in viral aerosol shedding. Correlations between nasopharyngeal swab and the aerosol fraction copy numbers were weak (r = 0.17, coarse; r = 0.29, fine fraction). Copy numbers in exhaled breath declined rapidly with day after onset of illness. Two subjects with the highest copy numbers gave culture positive fine particle samples.
Surgical masks worn by patients reduce aerosols shedding of virus. The abundance of viral copies in fine particle aerosols and evidence for their infectiousness suggests an important role in seasonal influenza transmission. Monitoring exhaled virus aerosols will be important for validation of experimental transmission studies in humans.
Influenza Virus Aerosols in Human Exhaled Breath: Particle Size, Culturability, and Effect of Surgical Masks
You've been misled, most likely because you're avoided the actual sites for such literature. Go to the source directly. And I get that a lot of political shaming against mask-wearing goes on. I'm sorry if that embarrasses you.
Also note the political shaming that occurs, not reasoning, not facts, just shaming.
Yep. A lot of "if you're afraid just hide in your house" stuff. Or "if you wear a mask, you're a sheeple."
We get that. Why would you even care what brainwashed people like that say?
And to the contrary, NOT wearing a mask is what is politically incorrect.
Nice try. But we've already seen all that stuff. Check out the post just above mine. And that's not even the most childish stuff. Put the politics aside and look at the science.
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