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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, @04:40PM (33 children)

    by Anonymous Coward on Monday July 27 2020, @04:40PM (#1027166)

    The virus will miraculously, just, disappear.

    The virus may be real. The disaster is definitely man made, right here in the Good Old U.S.A.! We finally made something of ourselves, showed the world what we're made of!

    Starting Score:    0  points
    Moderation   -1  
       Flamebait=2, Interesting=1, Total=3
    Extra 'Flamebait' Modifier   0  

    Total Score:   -1  
  • (Score: 0) by Anonymous Coward on Monday July 27 2020, @04:47PM (31 children)

    by Anonymous Coward on Monday July 27 2020, @04:47PM (#1027168)

    I'm wondering whether it will disappear right after November 3rd, regardless of who wins. It will no longer then be sustainable or useful to crush the people for partisan purposes.

    • (Score: -1, Redundant) by Anonymous Coward on Monday July 27 2020, @04:53PM

      by Anonymous Coward on Monday July 27 2020, @04:53PM (#1027171)

      --nomsg

    • (Score: 2) by Tork on Monday July 27 2020, @05:14PM (1 child)

      by Tork (3914) Subscriber Badge on Monday July 27 2020, @05:14PM (#1027179)

      I'm wondering whether it will disappear right after November 3rd, regardless of who wins. It will no longer then be sustainable or useful to crush the people for partisan purposes.

      I'm wondering which meme told you that.

      --
      🏳️‍🌈 Proud Ally 🏳️‍🌈
      • (Score: 0) by Anonymous Coward on Monday July 27 2020, @05:26PM

        by Anonymous Coward on Monday July 27 2020, @05:26PM (#1027188)

        QAnuts

    • (Score: 3, Funny) by Anonymous Coward on Monday July 27 2020, @05:30PM (21 children)

      by Anonymous Coward on Monday July 27 2020, @05:30PM (#1027193)

      Man, the other 99.96% of the planet is *really* dedicated to throwing this election.

      • (Score: 4, Funny) by tizan on Monday July 27 2020, @05:44PM

        by tizan (3245) on Monday July 27 2020, @05:44PM (#1027207)

        band on the head of the nail !
        All these governments and people across the world from Brazil to India, through Italy, Japan and Russia are faking it just because Trump is the super mega genius that is so good for US that everybody is jealous !

      • (Score: 2) by DeathMonkey on Monday July 27 2020, @06:52PM (9 children)

        by DeathMonkey (1380) on Monday July 27 2020, @06:52PM (#1027241) Journal

        Tell me about it! Do you have any idea how difficult it was to round up and murder 140,000 Americans and blame it on a fake virus?!?!?!?!

        • (Score: 0) by Anonymous Coward on Monday July 27 2020, @08:13PM (4 children)

          by Anonymous Coward on Monday July 27 2020, @08:13PM (#1027277)

          a fake virus?!?!?!?!

          No, 9 out of 10 Trump/Biden supporters agree, it's a China™ virus!

          • (Score: 2) by HiThere on Monday July 27 2020, @11:26PM (3 children)

            by HiThere (866) Subscriber Badge on Monday July 27 2020, @11:26PM (#1027388) Journal

            There are 10 Trump/Biden supporters?

            --
            Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
            • (Score: 0) by Anonymous Coward on Tuesday July 28 2020, @12:07AM (2 children)

              by Anonymous Coward on Tuesday July 28 2020, @12:07AM (#1027416)

              After all the votes are counted, you will find there are over 130 million of them, roughly 65 million for each

              • (Score: 2) by deimtee on Tuesday July 28 2020, @07:13AM (1 child)

                by deimtee (3272) on Tuesday July 28 2020, @07:13AM (#1027524) Journal

                There are 10 Trump/Biden supporters?

                After all the votes are counted, you will find there are over 130 million of them, roughly 65 million for each

                If you ask your questions carefully I think you will find that there are at least 120 million who are following Heinlein's advice - "even if you don't want to vote for any candidate, there's very likely someone to vote against".

                --
                If you cough while drinking cheap red wine it really cleans out your sinuses.
                • (Score: 0) by Anonymous Coward on Wednesday July 29 2020, @09:08PM

                  by Anonymous Coward on Wednesday July 29 2020, @09:08PM (#1028301)

                  Yes, strategic voting... and Trump after Trump after Trump will always be the invariable result.

        • (Score: 0) by Anonymous Coward on Monday July 27 2020, @09:56PM (3 children)

          by Anonymous Coward on Monday July 27 2020, @09:56PM (#1027332)
          • (Score: 0) by Anonymous Coward on Tuesday July 28 2020, @04:50AM (2 children)

            by Anonymous Coward on Tuesday July 28 2020, @04:50AM (#1027504)

            Linking an item from a satire site [babylonbee.com] doesn't really bolster your point:

            What is The Babylon Bee?

            The Babylon Bee is the world’s best satire site, totally inerrant in all its truth claims. We write satire about Christian stuff, political stuff, and everyday life.

            • (Score: 0) by Anonymous Coward on Tuesday July 28 2020, @07:56AM (1 child)

              by Anonymous Coward on Tuesday July 28 2020, @07:56AM (#1027529)

              I thought it was pretty obvious it's a joke site.
              Thank you though for pointing it out to those too slow to immediately get the joke.

              • (Score: 0) by Anonymous Coward on Tuesday July 28 2020, @02:28PM

                by Anonymous Coward on Tuesday July 28 2020, @02:28PM (#1027620)

                I thought it was pretty obvious it's a joke site.
                Thank you though for pointing it out to those too slow to immediately get the joke.

                You're welcome.

                The only problem is that the "joke" wasn't very funny. And I'm pretty easily amused.

      • (Score: 0) by Anonymous Coward on Monday July 27 2020, @07:02PM (8 children)

        by Anonymous Coward on Monday July 27 2020, @07:02PM (#1027245)

        Man, the other 99.96% of the planet is *really* dedicated to throwing this election.

        Britain and British Commonwealth. China and its client states. Western EU countries. While not "99.96%", those blocks together control more than 50% Earth populace.
        Notably, outside those blocks, the COVID-related behaviors are MUCH more varied; for some examples, look at Brazil, Vietnam, Belarus, Sweden.

        • (Score: 0) by Anonymous Coward on Monday July 27 2020, @07:38PM (7 children)

          by Anonymous Coward on Monday July 27 2020, @07:38PM (#1027262)

          Sweden is so interesting. They are definitely part of the US empire, but they were able to keep their herd immunity policy among intense pressure from the mainstream media (who seem to have the same ownership in Western Europe and America, according to their political line).

          • (Score: 2) by PartTimeZombie on Monday July 27 2020, @10:16PM (6 children)

            by PartTimeZombie (4827) on Monday July 27 2020, @10:16PM (#1027343)

            You're right, Sweden is interesting,

            ...but they were able to keep their herd immunity policy...

            until they realised the herd immunity policy does not work, and Swedes started dying in large numbers.

            Herd immunity works—if you don’t care how many people die [fortune.com]
            Of course, the jury is still out on whether herd immunity will even work, because we don't know yet if getting Covid gives immunity.

            • (Score: 0) by Anonymous Coward on Monday July 27 2020, @10:33PM (3 children)

              by Anonymous Coward on Monday July 27 2020, @10:33PM (#1027352)

              Yeah, large numbers. 6000 out of 10 000 000 according to their failed government. All those 5 994 000 sharing quality time with friends and family, lamenting that their betters didn't place them under house arrest for months, then force them to wear feel-good muzzles.

              • (Score: 0) by Anonymous Coward on Monday July 27 2020, @10:38PM

                by Anonymous Coward on Monday July 27 2020, @10:38PM (#1027354)

                Math is hard. I meant of course the 9 994 000 desperate free survivors crying about their lot.

              • (Score: 3, Funny) by PartTimeZombie on Tuesday July 28 2020, @12:32AM

                by PartTimeZombie (4827) on Tuesday July 28 2020, @12:32AM (#1027427)

                It must be exhausting trying to keep with whether you are obliged to hate Sweden or love them right now.

                Maybe you'll be told to hate and praise them in the same post. I'm sure Fox News will be issuing new orders shortly.

              • (Score: 2) by dry on Tuesday July 28 2020, @01:46AM

                by dry (223) on Tuesday July 28 2020, @01:46AM (#1027459) Journal

                That's a lot of deaths. Here, it is close to 300 out of 5.1 million people. Very few actual orders too, with the only fines for Americans who won't stay in their own country.

            • (Score: 2) by HiThere on Monday July 27 2020, @11:35PM (1 child)

              by HiThere (866) Subscriber Badge on Monday July 27 2020, @11:35PM (#1027394) Journal

              It appears that catching COVID gives an immunity that lasts for years. (There's a bit of inference there, but it's reasonable.) But it may not be a complete immunity.

              The thing is, antibodies appear to last for a couple of months (varies with the individual, but that's an average). But TCell based immunity looks as if it lasts for years. However TCell immunity doesn't work until some cells catch the disease. It's a plausible inference that the reason there are so many "silent spreader" cases is that a lot of people already have TCell based immunity, so the cases of COVID that they catch are so weak that they don't really notice it as anything special. But they can spread it to people who haven't been exposed.
              If this is true, it implies that the current COVID is only different by a couple of mutations from something that's been around for a long time, but which people haven't noticed...or have just thought "well, that was a bad flu this year", even though it was something else.

              Note that this post is full of a lot of suppositions, so don't believe it. But it's based on actual data, so don't disbelieve it either. Just file it under "maybe" and consider what evidence you would expect to find if it were to be true.

              --
              Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
              • (Score: 2) by PartTimeZombie on Tuesday July 28 2020, @12:29AM

                by PartTimeZombie (4827) on Tuesday July 28 2020, @12:29AM (#1027425)

                That was kind of the point I was trying to make.

                TL;DR: We don't know yet.

      • (Score: 2) by tangomargarine on Tuesday July 28 2020, @02:47PM

        by tangomargarine (667) on Tuesday July 28 2020, @02:47PM (#1027634)

        the other 99.96% of the planet

        Are you only counting one political party in your count of U.S. population, or what? The U.S. is 4.2% of the world population by itself, according to Google.

        --
        "Is that really true?" "I just spent the last hour telling you to think for yourself! Didn't you hear anything I said?"
    • (Score: 0) by Anonymous Coward on Monday July 27 2020, @06:00PM (5 children)

      by Anonymous Coward on Monday July 27 2020, @06:00PM (#1027218)

      unfortunately, this is about global medical tyranny, not just national elections.

      • (Score: 0) by Anonymous Coward on Monday July 27 2020, @06:40PM

        by Anonymous Coward on Monday July 27 2020, @06:40PM (#1027232)

        In the USA, it's both.

      • (Score: 2) by PartTimeZombie on Monday July 27 2020, @10:17PM (2 children)

        by PartTimeZombie (4827) on Monday July 27 2020, @10:17PM (#1027344)

        ...global medical tyranny...

        That's a new one. Have I been enslaved by a doctor?

        • (Score: 2) by HiThere on Monday July 27 2020, @11:38PM (1 child)

          by HiThere (866) Subscriber Badge on Monday July 27 2020, @11:38PM (#1027395) Journal

          Given the US health system, possibly by a doctor, but if not by your health insurance plan.

          --
          Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
      • (Score: 2) by dry on Tuesday July 28 2020, @01:52AM

        by dry (223) on Tuesday July 28 2020, @01:52AM (#1027460) Journal

        You mean the medical tyranny that has been going on for centuries, doing things like stopping us from shitting in the drinking water, forcing cooks to wash their hands and restaurants to close just because they had a few hundred rats running around the kitchen.
        The medical tyranny that has allowed the average lifespan to dramatically increase? I guess there are those who still don't believe in the germ theory of disease, as it is only a theory.

  • (Score: 2) by FatPhil on Monday July 27 2020, @08:08PM

    by FatPhil (863) <pc-soylentNO@SPAMasdf.fi> on Monday July 27 2020, @08:08PM (#1027273) Homepage
    > We finally made something of ourselves, showed the world what we're made of!

    10^25 virions, apparently.
    --
    Great minds discuss ideas; average minds discuss events; small minds discuss people; the smallest discuss themselves