Quote (Santara @ Dec 31 2021 02:41pm)
They invariably believe that since the know the size of the particles, and the filtration level of the masks, that they can make qualitative analysis of the efficacy, without doing any qualitative analysis.
"They", I assume, is CNN. A news platform iirc.
There's been numerous threads about face mask efficacy on jsp and I (among others) have already dropped all the necessary proof as to why wearing them makes sense.
There are meta-analyses to justify that stance. If there are now newer meta-analyses of equal or higher quality disregarding that scientific finding, I am happy to read the articles presented.
If you're not fully read-in on the subject, the story-in-a-nutshell is as follows:
1) Face masks do not stop aerosolic infection
2) Face masks (even cloth ones) do stop droplet-related infections
3) People interpret 1) as a justification to not wear masks "because they do not work". I venture this has something to do with the fact that it is a respiratory illness and thus people expect aerosolic infection to be the major component of infection rates
4) Using masks that prevent aerosolic infection on top of droplet infection
did not reduce infectivity rates with a statistical significance5) Using masks that prevent droplet infection reduces infectivity rate with statistical significance. The meta-analyses I often cited on JSP uses an OR of 0.55. I assume you know what this means or have the capacity to learn what it means by yourself.
The spread of sars-cov2 is mainly through droplet infection. This is why cloth masks are useful despite their sheer inability to reduce aerosolic release of virus particles. The innoculation through airbourne particles is just too little to cause an infection for nearly everyone who comes across these particles. In other words, you need "more" virus particles to become infected than you are likely to get with aerosols without droplets. I emphasize point 4.
/e
Quote (sirthom @ Dec 31 2021 02:45pm)
1. “We know that wearing a mask outside health care facilities offers little, if any, protection from infection. In many cases, the desire for widespread masking is a reflexive reaction to anxiety over the pandemic. Focusing on universal masking alone may, paradoxically, lead to more transmission of Covid-19 if it diverts attention from implementing more fundamental infection-control measures.” (Study No. 8) —
https://www.nejm.org/doi/full/10.1056/NEJMp20063722. “Exercising with facemasks may reduce available Oxygen and increase air trapping preventing substantial carbon dioxide exchange. Further contrary to the earlier thought, no evidence exists to claim the facemasks during exercise offer additional protection from the droplet transfer of the virus.” (Study No. 12) —
https://pubmed.ncbi.nlm.nih.gov/32590322/3. “A survey of peer-reviewed studies shows that universal mask wearing (as opposed to wearing masks in specific settings) does not decrease the transmission of respiratory viruses from people wearing masks to people who are not wearing masks.” (Study No. 27) —
https://wattsupwiththat.com/2020/07/25/does-universal-mask-wearing-decrease-or-increase-the-spread-of-covid-19/4. “In fact, it is not unreasonable at this time to conclude that surgical and cloth masks, used as they currently are, have absolutely no impact on controlling the transmission of Covid-19 virus, and current evidence implies that face masks can be actually harmful.” (Study No. 28) —
https://www.aier.org/article/masking-a-careful-review-of-the-evidence/5. “The healthy people in our society should not be punished for being healthy, which is exactly what lockdowns, distancing, mask mandates, etc. do…Children should not be wearing face coverings. We all need constant interaction with our environments and that is especially true for children. This is how their immune system develops. They are the lowest of the low-risk groups. Let them be kids and let them develop their immune systems… The “Mask Mandate” idea is a truly ridiculous, knee-jerk reaction and needs to be withdrawn and thrown in the waste bin of disastrous policy, along with lockdowns and school closures.” (Study No. 36) —
https://www.aier.org/article/the-year-of-disguises/6. “1,951,905 children in Sweden (as of December 31, 2019) who were 1 to 16 years of age, were examined…social distancing was encouraged in Sweden, but wearing face masks was not…No child with Covid-19 died.” (Study No. 37) —
https://www.nejm.org/doi/10.1056/NEJMc20266707. “As recently as 2010, the US National Academy of Sciences declared that, in the community setting, “face masks are not designed or certified to protect the wearer from exposure to respiratory hazards.” A number of studies have shown the inefficacy of the surgical mask in household settings to prevent transmission of the influenza virus.” (Study No. 42) —
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4868614/8. “A Centers for Disease Control report released in September shows that masks and face coverings are not effective in preventing the spread of COVID-19, even for those people who consistently wear them.” (Study No. 56) —
https://thefederalist.com/2020/10/12/cdc-study-finds-overwhelming-majority-of-people-getting-coronavirus-wore-masks/9. “Mask mandates and lockdowns have had no discernible impact.” (Study No. 67) —
https://swprs.org/the-face-mask-folly-in-retrospect/10. “Mandating masks has not kept death rates down anywhere. The 20 U.S. states that have never ordered people to wear face masks indoors and out have dramatically lower COVID-19 death rates than the 30 states that have mandated masks. Most of the no-mask states have COVID-19 death rates below 20 per 100,000 population, and none have a death rate higher than 55. All 13 states that have death rates higher [than] 55 are states that have required the wearing of masks in all public places. It has not protected them.” (Study No. 75) —
https://visionlaunch.com/more-than-a-dozen-credible-medical-studies-prove-face-masks-do-not-work-even-in-hospitals/I shall give this a proper read later to see if your sources check out and if the articles are worth the read. I suspect they have been refuted, have low study quality, are not free from conflict of interests or do not produce enough power for a conclusion, but at least you came up with enough material to justify looking into it. I'm in the middle of my exams though so it may take a while (weeks), but remind me if I haven't gotten back to you before February.
This post was edited by Leeevee on Dec 31 2021 07:51am