Do masks actually work? The best studies suggest they don't (msn.com)
Quotes from the article:
“The answer: It depends on the study.”
“Anderson cites multiple medical studies on masking that fall into one of two categories: observational studies or randomized controlled trials, dubbed RCTs. He notes that much of the scientific community has based its masking guidance on observational studies rather than RCTs. (Note: Anderson is referencing cloth and surgical masks, not N95 respirators).”
My comments: Hello; The distinction about N95 masks can be important. Problem has been finding them. There is an KN95 which has similar value. There is an N95 type mask with an exhaust valve which I had a small supply of when the pandemic started. Problem is that valve lets out my breath.
“He goes on to cite several trials conducted over the past several years, each of which found that cloth masks and surgical masks offer very little to no benefit at all. The one trial that specifically tested masks against COVID-19 was a 2020 study in Denmark with 4,800 participants. The researchers found that “1.8 percent of those in the mask group and 2.1 percent of those in the control group became infected with Covid-19 within a month, with this 0.3-point difference not being statistically significant,” Anderson writes.”
“Incredibly, the CDC has dismissed the Danish study as “inconclusive” and “too small” while praising the observational study of the Missouri hairdressers, with its fewer than 200 participants and no control group, as a landmark case, Anderson said.”
My comments: Hello; I find this interesting. If true that the CDC dismissed a trial study of 4,800 and used an observational study with no control group. See the GYM paragraph for a comparison.
“is a 2015 study that directly
compared cloth masks to surgical masks. Its 1,100 participants, each of whom was a healthcare worker, were instructed to wear their masks at all times on every shift for four weeks. The study found that those who wore cloth masks were 13 times more likely to develop an influenzalike illness than those who wore surgical masks.
But even the surgical masks were found to be “poor” at preventing the penetration of particles, and cloth masks were “extremely poor.” Surgical masks let through 44% of particles. Cloth masks let through 97%.”
“Anderson concludes:”
“In sum, of the 14 RCTs that have tested the effectiveness of masks in preventing the transmission of respiratory viruses, three suggest, but do not provide any statistically significant evidence in intention-to-treat analysis, that masks might be useful. The other eleven suggest that masks are either useless — whether compared with no masks or because they appear not to add to good hand hygiene alone — or actually counterproductive. Of the three studies that provided statistically significant evidence in intention-to-treat analysis that was not contradicted within the same study, one found that the combination of surgical masks and hand hygiene was less effective than hand hygiene alone,
one found that the combination of surgical masks and hand hygiene was less effective than nothing, and one found that cloth masks were less effective than surgical masks.”
“This is important because an honest conversation about masks requires taking a hard look at the scientific evidence backing them. And if Anderson is right and the CDC's observational studies are as sloppy and inconclusive as they appear to be, that's a problem.
Millions of people have been led to believe that the only way they can protect themselves against this virus, besides getting vaccinated, is by strapping a piece of cloth around their noses and mouths. Social media giants and everyday busybody scolds have shamed and punished anyone who questions this guidance.”
“But the data cited by Anderson suggests that not only was this guidance wrong but that public health officials knew it was wrong and rolled it out anyway.”
My comments: Hello; The point for me is how to know what is effective. If the reality is a mask is slightly better than nothing, then let us know the truth. If we need an N95 level mask to be worth much, then let us know. Something I had already known was that well set up trials are the way to get good information. Masks are starting to be mandated again. It would be good, in my ignorant way of thinking, to have some source of information to trust.
I knew better back when the “good lie” was told at the start of the outbreak. I also knew it was important to have a good mask. Maybe I am getting things backward but seems to me that an authority ought to have the “good” masks available before issuing a mandate.
My country ramped up the production of ventilators to the point of having some to export. I do not see why an N95 type mask supply cannot be given the same push if these mandates are to be used again. I see way too many neck gaitors(sp) when out.