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posted by Fnord666 on Monday July 27 2020, @03:01PM   Printer-friendly
from the and-they-need-to-actually-fit dept.

Home-made face masks likely need at least 2 layers to curb COVID-19 spread:

Home-made cloth face masks likely need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets from the nose and mouth that are associated with the spread of COVID-19, indicates a video case study published online in the journal Thorax.

[...] A team of Australian researchers therefore compared the effectiveness of single and double-layer cloth face coverings (175 g/m² cotton fabric, with a thread count of 170/ inch) with a 3-ply surgical face mask (Bao Thach) at reducing droplet spread.

[...] The video recording showed that the 3-ply surgical face mask was the most effective at reducing airborne droplet dispersal, although even a single layer cloth face covering reduced the droplet spread from speaking.

But a double layer covering was better than a single layer in reducing the droplet spread from coughing and sneezing, the recording showed.

This is just one case, added to which several other factors contribute to the effectiveness of cloth face masks, note the researchers. These include the type of material used, design and fit, as well as the frequency of washing.

Nevertheless, based on their observations, a home made cloth mask with at least two layers is preferable to a single layer mask, they say, adding: "Guidelines on home-made cloth masks should stipulate multiple layers."

And they emphasise: "There is a need for more evidence to inform safer cloth mask design, and countries should ensure adequate manufacturing or procurement of surgical masks."

Journal Reference:
Prateek Bahl, Shovon Bhattacharjee, Charitha de Silva, et al. Face coverings and mask to minimise droplet dispersion and aerosolisation: a video case study [$], Thorax (DOI: 10.1136/thoraxjnl-2020-215748)


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  • (Score: -1, Flamebait) by Anonymous Coward on Monday July 27 2020, @05:54PM (21 children)

    by Anonymous Coward on Monday July 27 2020, @05:54PM (#1027214)

    no, all you bootlicking slaves are the fucking problem. i'm not against anyone wearing a mask. i would actually prefer to wear one. I'm against the masses helping to enforce mandates that violates everyone's freedoms. don't give me that collectivist bullshit about me being responsible for nature and your compromised immune system either. die already.

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  • (Score: 3, Informative) by Tork on Monday July 27 2020, @06:12PM (2 children)

    by Tork (3914) Subscriber Badge on Monday July 27 2020, @06:12PM (#1027223)

    no, all you bootlicking slaves are the fucking problem. ... I'm against the masses helping to enforce mandates that violates everyone's freedoms.

    Actually if there were more 'bootlicking slaves' earlier then you wouldn't have had to endure this strange group-delusion about your freedoms being violated.

    --
    🏳️‍🌈 Proud Ally 🏳️‍🌈
    • (Score: 0) by Anonymous Coward on Monday July 27 2020, @08:23PM (1 child)

      by Anonymous Coward on Monday July 27 2020, @08:23PM (#1027284)

      In Jan/Feb the "bootlicking slaves" were saying closing the borders, etc was racist. Instead we should hug chinese tourists. Do not listen to the media.

      • (Score: 0) by Anonymous Coward on Monday July 27 2020, @08:31PM

        by Anonymous Coward on Monday July 27 2020, @08:31PM (#1027288)
        > In Jan/Feb the "bootlicking slaves" were saying closing the borders, etc was racist ... Regulating who can and cannot enter is not 'closing the border'. > Do not listen to the media. Yeah cos the news source telling you your freedoms are being infringed is working out sooOOooo well for you.
  • (Score: 4, Funny) by DeathMonkey on Monday July 27 2020, @06:55PM (17 children)

    by DeathMonkey (1380) on Monday July 27 2020, @06:55PM (#1027242) Journal

    Yes, being forced to wear a piece of cloth is TYRRANNY!!!

    That's why I demand the freedom to display my balls in all public spaces. Pants mandates violate everyone's FREEDOM!!

    • (Score: 0) by Anonymous Coward on Monday July 27 2020, @08:16PM (2 children)

      by Anonymous Coward on Monday July 27 2020, @08:16PM (#1027281)

      That's why I demand the freedom to display my balls in all public spaces.

      All you need to do is self-identify as a woman.

      Then if anyone challenges you, call that person a bigot and proclaim that you are being oppressed.

      • (Score: 2) by DeathMonkey on Monday July 27 2020, @08:42PM (1 child)

        by DeathMonkey (1380) on Monday July 27 2020, @08:42PM (#1027294) Journal

        Women are required to wear TWO pieces of cloth. DOUBLE TYRRANNY!!!!!!

        • (Score: 0) by Anonymous Coward on Tuesday July 28 2020, @06:47AM

          by Anonymous Coward on Tuesday July 28 2020, @06:47AM (#1027518)

          Yeah, but they don't have to hide their balls which is what you were complaining about.

    • (Score: 3, Insightful) by helel on Monday July 27 2020, @09:02PM (13 children)

      by helel (2949) on Monday July 27 2020, @09:02PM (#1027298)

      You joke but anti-nudity laws are a clear example of violating our rights without any justification. "Your rights end where my nose begins," as people like to say. You may not like seeing my naked body but, fundamentally, it's my body and should be my choice on how to present it in public.

      • (Score: 4, Insightful) by DeathMonkey on Monday July 27 2020, @09:29PM (11 children)

        by DeathMonkey (1380) on Monday July 27 2020, @09:29PM (#1027318) Journal

        And yet, all those conservatives oppose the Free the Nipple stuff.

        It's almost like they don't actually believe a goddamn thing they're saying!

        • (Score: 3, Insightful) by PartTimeZombie on Monday July 27 2020, @10:01PM (10 children)

          by PartTimeZombie (4827) on Monday July 27 2020, @10:01PM (#1027336)

          It's almost like they don't actually believe a goddamn thing they're saying!

          They don't, but they have also managed to train a whole bunch of Americans to hold mutually contradictory positions and swear by both of them.

          It's weird, but propaganda is powerful.

          • (Score: 0, Disagree) by Anonymous Coward on Monday July 27 2020, @11:31PM (8 children)

            by Anonymous Coward on Monday July 27 2020, @11:31PM (#1027390)

            There is such a thing as common decency. Apparently there are some people who dont have it and thats why theres anti nudity laws. I see the parallel but i cant equate the mask thing. Its more restrictive and a hindrance to communication and living than clothes are. Efficacy is also questionable. And theoretically people arent as uncomfortable seeing a face than a cock and balls, and im pretty sure thats not a conservative only viewpoint when out in public.

            • (Score: 4, Insightful) by sjames on Tuesday July 28 2020, @09:59AM (7 children)

              by sjames (2882) on Tuesday July 28 2020, @09:59AM (#1027545) Journal

              I would say that at least trying not to give people COVID during a pandemic falls under common decency.

              • (Score: -1, Flamebait) by Anonymous Coward on Tuesday July 28 2020, @11:17PM

                by Anonymous Coward on Tuesday July 28 2020, @11:17PM (#1027833)

                I would say that at least trying not to give people COVID during a pandemic falls under common decency.

                Which is done by keeping distance from people you do not need be near to (the "social distancing") and not going in public when having any respiratory symptoms (and definitely not when tested to actually have COVID). This is sufficient, as Latvia's example amply demonstrates - by having, and continuing to have, much better results than in all the neighboring countries that had the lockdowns and the mandatory masks (and than in most countries in the world that had those).
                https://www.statista.com/statistics/1104709/coronavirus-deaths-worldwide-per-million-inhabitants/ [statista.com]

              • (Score: 0) by Anonymous Coward on Thursday July 30 2020, @01:38AM (5 children)

                by Anonymous Coward on Thursday July 30 2020, @01:38AM (#1028416)

                Do you truly believe wearing a thin layer of porous clith over your face does anything at all? Wow

                • (Score: 2) by sjames on Thursday July 30 2020, @02:27AM (4 children)

                  by sjames (2882) on Thursday July 30 2020, @02:27AM (#1028436) Journal

                  Yes. This was discovered in the mid 19th century and is why surgeons wear masks. Do try to keep up!

                  • (Score: 0) by Anonymous Coward on Thursday July 30 2020, @11:49AM (1 child)

                    by Anonymous Coward on Thursday July 30 2020, @11:49AM (#1028551)

                    https://www.rcreader.com/commentary/masks-dont-work-covid-a-review-of-science-relevant-to-covide-19-social-policy [rcreader.com]

                    Also, bacteria are why surgeons wear masks. Little different there guy. Do try to keep up.

                    • (Score: 2) by sjames on Friday July 31 2020, @05:29PM

                      by sjames (2882) on Friday July 31 2020, @05:29PM (#1029383) Journal

                      You (or another AC) trotted that one out already and it got shot down since none of the cherry picked studies were actually relevant to the current situation. Try to read more critically. Details matter.

                      There is nothing specific to bacteria about masks, it's pretty much anything that might hitch a ride on droplets of saliva and mucous.

                  • (Score: 0) by Anonymous Coward on Thursday July 30 2020, @12:17PM (1 child)

                    by Anonymous Coward on Thursday July 30 2020, @12:17PM (#1028559)

                    Also, see the article headline. See congressional hearings. Take mask off to talk, defeat whatever imaginary purpose it had to begin with. See restaurant protocals, wear mask through door, take off to eat, no purpose. Itsfundamentally stupud and should be seen to be a farce to any rationally minded semi educated individual that doesnt believe in magical talismans or authoritarian compliance indicators. Its bullshit, and anyone with a scientifically literate mind can see that. I dont know if youre being desingenious or uneducated and stupud, but it doesnt mattet. This site, like most, is heavily biased as far as moderation and narrative is concerned. Yall are lucky people with thinking minds still care to comment under these circumstances. The studies cited in the link on the previous reply show the lack of efficacy of even surgical masks regarding airborn respuratory infections. Let alone wearing a ratty unwashed bandana or knit scarf over the face. The mask thing is obviously nothing more than a compliance/submission indicator, and i find it hilarious how stupud, uneducated, and submissive to your masters backing current policy makes you all look.

                    • (Score: 2) by sjames on Friday July 31 2020, @05:38PM

                      by sjames (2882) on Friday July 31 2020, @05:38PM (#1029389) Journal

                      The first one makes sense if you consider that the person speaking is at a fair distance from the audience and that it was a necessary compromise to get the more paleolithic congress critters on-board at all.

                      The second is mostly perpetrated by other political critters that want to open all the things yesterday and loss of life be damned. For the record, I oppose the mask exception for restaurants exactly because it does make a mockery of appropriate precautions.

                      As for the rest, you sound like you're about 30 seconds away from going on a rant about modern people using little boxes they hold up to their ears to talk to the devil.

          • (Score: -1, Troll) by Anonymous Coward on Tuesday July 28 2020, @12:00PM

            by Anonymous Coward on Tuesday July 28 2020, @12:00PM (#1027564)

            It's weird, but propaganda is powerful.

            Nah, more of a case of Americans having a feeble mind.

      • (Score: 2) by Oakenshield on Tuesday July 28 2020, @12:44PM

        by Oakenshield (4900) on Tuesday July 28 2020, @12:44PM (#1027577)

        "Your rights end where my nose begins," as people like to say. You may not like seeing my naked body but, fundamentally, it's my body and should be my choice on how to present it in public.

        You need to spend some time browsing People of Walmart. If that isn't assault on the eyes I don't know what is. Do you really want to see any of that nekkid?