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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)
(Score: 2) by Opportunist on Monday July 27 2020, @06:44PM (9 children)
Yes. People. People are stupid. Care to point at any official statement telling you to wear a mask when nobody is around?
(Score: 5, Funny) by sjames on Monday July 27 2020, @07:30PM (1 child)
Considering that he reports that when he's outside with nobody around, people yell at him, I suspect mental illness.
(Score: 0) by Anonymous Coward on Monday July 27 2020, @08:59PM
Learn English, dummy.
(Score: 2) by Oakenshield on Tuesday July 28 2020, @01:07PM (6 children)
State of Ohio mask requirement order starting July 23 @ 6:00PM.
Masks are required with very narrow exceptions:
--- At an indoor location that is not a residence
I am in a building mostly by myself in an office completely by myself. I see maybe two people per day as our place of work is closed and I am considered essential personnel. This is no exception despite the fact that I frequently have the whole floor of the building to myself and may see nobody the entire day. I am at least given a generous exception while actively eating lunch.
--- Waiting for, riding, driving, or operating public transportation, such as a taxi, a car service, or a private car used for ride-sharing.
Standing outside your home waiting for an Uber or taxi requires a mask regardless of proximity to anyone.
https://governor.ohio.gov/wps/portal/gov/governor/media/news-and-media/covid19-update-07222020 [ohio.gov]
(Score: 0) by Anonymous Coward on Tuesday July 28 2020, @02:39PM (4 children)
That's what you get for living in a state with an (R) governor.
Move out of the sticks, friend.
(Score: 0) by Anonymous Coward on Tuesday July 28 2020, @03:26PM (3 children)
That's what he gets for living in Ohio! Seriously, you should have known the government would be drooling retards when you look at the population
(Score: 2) by Oakenshield on Tuesday July 28 2020, @06:42PM (2 children)
Nice to see the open bigotry of those who hate us flyovers. It reminds me of how we so narrowly dodged the bigot-in-chief and queen snob back in 2016.
(Score: 0) by Anonymous Coward on Tuesday July 28 2020, @09:30PM (1 child)
I don't *hate* anyone. And going to college in Ohio, and living in a wide variety of places in the US over the past 30 years, I found that we're all pretty similar. With similar interests, dreams and desires. And most of us are decent, caring humans who just want a decent life for themselves and their families.
That you think people *hate* you because you live in "flyover country" (your term, not mine) says more about you than it does about everyone else.
Perhaps that's something you should consider?
(Score: 0) by Anonymous Coward on Wednesday July 29 2020, @12:15AM
When someone posts the following:
I think it's a safe bet someone hates us. What is says about me is that I calls 'em as I sees 'em.
(Score: 0) by Anonymous Coward on Tuesday July 28 2020, @05:55PM
Often such requirements like "at all times" which violate common sense are merely to make enforcement easier. Clesrs up any possible confusion about when exactly they have to put it on. Generally I just use my common sense and put the mask on when needed and don't worry too much about a cop hassling me over a technicality.