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Author Topic: Masks  (Read 7386 times)

blumenkraft

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Re: Masks
« Reply #150 on: July 16, 2020, 12:44:34 PM »
After universal masking was implemented at Mass General Brigham, the rate of COVID-19 infection among health care workers dropped significantly. "For those who have been waiting for data before adopting the practice, this paper makes it clear: Masks work."

Association Between Universal Masking in a Health Care System and SARS-CoV-2 Positivity Among Health Care Workers

Link >> https://jamanetwork.com/journals/jama/fullarticle/2768533

Sigmetnow

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Re: Masks
« Reply #151 on: July 18, 2020, 03:39:20 PM »
A new survey finds hundreds of McDonald's workers have been assaulted by anti-mask customers, as mandatory masks become the norm
Quote
As mask requirements becomes the norm during the coronavirus pandemic, companies are facing looming questions on how workers can safely enforce new policies.

A Service Employees International Union survey of 4,187 McDonald's workers shared with Business Insider found that 44% of respondents said they had been verbally or physically assaulted after confronting customers who weren't wearing masks.

While the SEIU only surveyed a small proportion of the chain's more than 800,000 workers in the US, the 44% of respondents alone represent more than 1,800 employees who say they have been assaulted on the job.
...

The United Food and Commercial Workers Union has similarly pushed for retailers to roll out national mask policies, with president Marc Perrone saying on Thursday that Target and Walmart's announcements were "long overdue."

"Every retailer and grocery store across this nation must adopt a mask requirement, and enforcement must be done by trained professionals, not retail workers already stretched thin during this crisis," Perrone said in a statement. ...
https://www.businessinsider.com/workers-face-verbal-and-physical-assaults-from-anti-mask-customers-2020-7

[FWIW, I note that the drivethru photo in the article is not from US (it hasn’t been reversed, because the “Quatro” emblem on car is correct).  The article is by Business Insider, owned by German publishing congomerate with known history of articles with a negative slant (e.g., anti-Tesla).  So be cautious in interpreting it.]
People who say it cannot be done should not interrupt those who are doing it.

blumenkraft

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Re: Masks
« Reply #152 on: July 19, 2020, 08:09:14 PM »
Interesting!

“It has been shown that only those employees who had plastic visors were infected. There was not a single infection among employees with a mask.”: Swiss government warns against face shields

Link >> https://www.thelocal.ch/20200715/only-those-with-plastic-visors-were-infected-swiss-government-warns-against-face-shields/

SteveMDFP

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Re: Masks
« Reply #153 on: July 19, 2020, 08:17:12 PM »
Interesting!

“It has been shown that only those employees who had plastic visors were infected. There was not a single infection among employees with a mask.”: Swiss government warns against face shields

Link >> https://www.thelocal.ch/20200715/only-those-with-plastic-visors-were-infected-swiss-government-warns-against-face-shields/

Thanks for this.  It *is* interesting, and potentially quite useful.  I would think that face shields might add a bit of protection against transmission to the eyes.  But probably this is a minor risk compared with the physics of inhaling air (and its suspended particles) through mouth/nose, but not eyes.  The relevant passage from the article here is:
"Plastic face shields should be worn in tandem with a face mask, say cantonal authorities."

Cheers.

blumenkraft

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Re: Masks
« Reply #154 on: July 19, 2020, 08:18:50 PM »
Welcome, Steve. Cheers! :)

blumenkraft

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Re: Masks
« Reply #155 on: July 21, 2020, 08:40:21 AM »
Growing Body Of Evidence Suggests Masks Protect Those Wearing Them, Too

Link >> https://www.npr.org/2020/07/20/893227088/growing-body-of-evidence-suggests-masks-protect-those-wearing-them-too

The viral dose is key! If you initially get a very high dose of virus, you turn out sicker. A mask can lower the viral dose you are exposed to even though they don't filter out everything. This might just be the difference between surviving the illness - or not.

vox_mundi

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Re: Masks
« Reply #156 on: July 25, 2020, 04:08:43 AM »
“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.” ― Leonardo da Vinci

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

blumenkraft

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Re: Masks
« Reply #157 on: July 25, 2020, 06:31:30 PM »
Art!


blumenkraft

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Re: Masks
« Reply #158 on: July 26, 2020, 09:23:33 PM »
The viral dose is key.

Via Fox News!!

Mounting evidence shows masks may help avoid severe illness, even if you get COVID-19

Link >> https://outline.com/paBagK

Tom_Mazanec

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Re: Masks
« Reply #159 on: August 04, 2020, 01:38:06 AM »
Anti-masks from a conservative Catholic canon lawyer:
Can We Be Required To Wear Masks At Mass?
https://canonlawmadeeasy.com/2020/07/30/can-we-be-required-to-wear-masks-at-mass/#more-3245
For some reason I am unable to copy and paste this, but disclosure - I wear a mask at Mass.
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Florifulgurator

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Re: Masks
« Reply #160 on: August 04, 2020, 06:17:21 PM »
Google image search on my avatar image gives "wood". In fact it is the lower part of David Hilbert's tombstone.

Tom_Mazanec

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Re: Masks
« Reply #161 on: August 04, 2020, 06:27:45 PM »
Of course our great-great grandparents were much more sensible than us, right? They would not have protested wearing masks to fight a deadly disease...they knew what disease could do. This anti-mask nonsense is just an example of how stupid the 21st Century is, right?
WRONG!
https://en.wikipedia.org/wiki/Anti-Mask_League_of_San_Francisco
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blumenkraft

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Re: Masks
« Reply #162 on: August 04, 2020, 06:35:36 PM »
That's a cool video, Martin. Thanks for sharing.

Tom_Mazanec

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Re: Masks
« Reply #163 on: August 05, 2020, 12:40:31 PM »
Houston Mayor Orders $250 Fines For People Who Refuse to Wear Masks
https://summit.news/2020/08/04/houston-mayor-orders-250-fines-for-people-who-refuse-to-wear-masks/
Quote
“For months, we have been focusing on education and not citations, but now I am instructing the Houston Police Department to issue the necessary warnings and citations to anyone not wearing a mask in public if they do not meet the criteria for an exemption,” the mayor said Monday at a press briefing.
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vox_mundi

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Re: Masks
« Reply #164 on: August 08, 2020, 03:32:50 AM »


Electric Cooker An Easy, Efficient Way to Sanitize N95 Masks, Study Finds
https://medicalxpress.com/news/2020-08-electric-cooker-easy-efficient-sanitize.html
“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.” ― Leonardo da Vinci

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

longwalks1

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Re: Masks
« Reply #165 on: August 08, 2020, 08:45:24 PM »
The caveats underneath the video on the original Youtube page give one cause to re-evaluate this as a S.O.P. 

Quote
Uh... I think this is only good for masks with woven elastic straps.  212F for 50 minutes?  Anything plastic, or nitrile will likely melt with this method.  Not good.  If you only used it on an 1860 model, you should not generalize the study to include all N95s.  Did you even test the 1860S?  I'll stick with UVC for the time being.  I understand there aren't enough studies yet, but if it's good enough to kill C. diff, I think it'll kill SARS-CoV-2 without much trouble.


Quote
FreeBird Safety Services
1 day ago
As a professional Respirator Fit Tester with over 1500 people fit tested in the medical and dental 8 since Feb. 2020, I have some questions. Did you only perform this test on the 3M 1860? How did it fare with a 3M 8210? As you know the 8210 has rubber straps for donning. Did they melt.
It, s not just the filtration that's important, but pressure onto the face when Donning a respirator is just as vital.
Do to the KN95 from China saturating the market, was this test conductet on them as well.
One final question. How did you conduct the fit test that proved the 1860 was still achieving a 100% seal to a person's face.

Tom_Mazanec

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Re: Masks
« Reply #166 on: August 09, 2020, 04:21:47 PM »
Europe's Top Health Officials Say Masks Aren't Helpful in Beating COVID-19
https://fee.org/articles/europes-top-health-officials-say-masks-arent-helpful-in-beating-covid-19/
Quote
The problem with mask mandates is that public health officials are not merely recommending a precaution that may or may not be effective.

They are using force to make people submit to a state order that could ultimately make individuals or entire populations sicker, according to world-leading public health officials.

Irregardless, I am still wearing my masks. Even my Trumpist guardian wears masks.
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blumenkraft

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Re: Masks
« Reply #167 on: August 09, 2020, 04:40:08 PM »
Well, those are not Europe's Top Health Officials. Never heard of them to be honest. So the article is lying from the get-go.

But of course they do the water carrying since they are the outlet for a libertarian think-tank.

Villabolo

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Re: Masks
« Reply #168 on: August 12, 2020, 02:45:18 PM »
I've got an Israeli - old school - military gas mask and a Russian one. The Israeli mask makes me look like a scuba diver from the head up. The Russian one makes me look like an alien, particularly the one that Han Solo shot at the bar in Star Wars. They are both NBC rated, providing protection from nuclear, biological and chemical agents. Their filters don't last long, though.

I wore the Israeli one at the supermarket just to see people's reaction. No one gave me a second look.



Israeli NBC gas mask



Russian gas mask


Other than that, I have a N-95 respirator, like the one that hospitals use. I had to remove the yellow elastic bands which wear out after a few uses. I replaced it with a sturdy elastic band. I launder it along with my regular laundry and hang it in the sun to dry. The sun's UV is a good sanitizer.
« Last Edit: August 12, 2020, 02:54:00 PM by Villabolo »

blumenkraft

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Re: Masks
« Reply #169 on: August 12, 2020, 04:09:03 PM »
Well, there is no debate about the efficacy of those.  ;D

Tom_Mazanec

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Re: Masks
« Reply #170 on: August 17, 2020, 12:49:42 PM »
It’s Time to Roll Back the Mask Mandates, Not Ramp Them Up Ridiculously
https://www.americanthinker.com/articles/2020/08/its_time_to_roll_back_the_mask_mandates_not_ramp_them_up_ridiculously.html
Quote
Dr. Scott Atlas, who has thankfully been tapped by President Trump as an adviser, suggests that the “goal of stopping COVID-19 cases is not the appropriate goal.”  Rather, “the goal is simply twofold, to protect the people who are going to have a serious problem and die, that’s the high-risk population, and to stop hospital overcrowding.  There should never be and there is no goal to stop college students from getting an infection they have no problem with.”

Incidentally, this is the same approach that Dr. David Katz recommended in the New York Times on March 20, suggesting “a pivot right now from trying to protect all people to focusing on the most vulnerable.”

This is the strategy that American policymakers should adopt in order to get us through this pandemic quickly and with as few deaths, and as little strain on our hospitals, as possible.  It would allow most Americans to get back to their lives with a semblance of normalcy, increase their happiness, and rebuild the economy.  And it seems clear that this is what President Trump wants for Americans.
Well, as a sexagenarian I am one of those vulnerable people. And a small but significant percentage of those younger people end up with long term complications.
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vox_mundi

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Re: Masks
« Reply #171 on: August 25, 2020, 02:00:13 PM »
https://mobile.twitter.com/samkimasia/status/1297116978964905984

A person sitting under an airconditioner infected 27 others with coronavirus at a Starbucks cafe in South Korea, but none of employees, who were wearing masks, got the virus.



https://m.chosun.com/svc/article.html?sname=news&contid=2020081904509&Dep0=www.google.com&docRefURL=https://www.google.com/
“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.” ― Leonardo da Vinci

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

vox_mundi

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Re: Masks
« Reply #172 on: September 01, 2020, 11:18:31 PM »
Face Shields, Masks With Valves Ineffective Against COVID-19 Spread: Study
https://phys.org/news/2020-09-shields-masks-valves-ineffective-covid-.html



... To increase public awareness about the effectiveness of face shields alone as well as face masks with exhalation valves, researchers from Florida Atlantic University's College of Engineering and Computer Science used qualitative visualizations to test how face shields and masks with valves perform in impeding the spread of aerosol-sized droplets. Widespread public use of these alternatives to regular masks could potentially have an adverse effect on mitigation efforts.

Results of the study show that although face shields block the initial forward motion of the jet, the expelled droplets move around the visor with relative ease and spread out over a large area depending on light ambient disturbances. Visualizations for the face mask equipped with an exhalation port indicate that a large number of droplets pass through the exhale valve unfiltered, which significantly reduces its effectiveness as a means of source control.

"Visualizing droplet dispersal for face shields and masks with exhalation valves," Physics of Fluids, 2020
https://aip.scitation.org/doi/pdf/10.1063/5.0022968
“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.” ― Leonardo da Vinci

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

SteveMDFP

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Re: Masks
« Reply #173 on: September 02, 2020, 12:20:04 AM »
Face Shields, Masks With Valves Ineffective Against COVID-19 Spread: Study
https://phys.org/news/2020-09-shields-masks-valves-ineffective-covid-.html

Thanks for posting this.  Early in the pandemic, I got a box of N95s--with exhalation valve.  Pretty clearly, I've been protecting myself, but not protecting people I expose.  I'll be covering the inside of the vents with tape.  Glasses will fog up more.  Small price to pay for being socially responsible.

Bruce Steele

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Re: Masks
« Reply #174 on: September 02, 2020, 02:00:10 AM »
Steve, Just wear a surgical mask over your n-95.
Do you think enough people wearing masks will modify this years influenza season?  I am going to get nervous around coughing and sneezing that the cold/ influenza season brings. When we get Covid positivity rates at 10-20% I would think people could be spreading both a cold and Covid at the same time and that the coughing and sneezing associated with cold season will make Covid RO even worse.
 It seems like the Southern Hemisphere would already inform this issue but I haven’t seen anything other than reports of a mild flu season forecast.

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Re: Masks
« Reply #175 on: September 02, 2020, 02:17:55 AM »
a properly fitted mask should not be fogging up your glasses.

SteveMDFP

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Re: Masks
« Reply #176 on: September 02, 2020, 03:37:06 AM »
Steve, Just wear a surgical mask over your n-95.
Do you think enough people wearing masks will modify this years influenza season? 

Covid seems substantially more contagious than influenza.  Any measures that reduce Covid's R-nought to near 1 should drop influenza's R to well below one.  I'm expecting the mildest influenza season in recent history.

I read just the other day, somewhere, that there's no sign of influenza spread in the southern hemisphere yet.  So that, so far, supports my surmise.

vox_mundi

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Re: Masks
« Reply #177 on: September 18, 2020, 02:22:14 AM »
COVID Karma: An Idaho Pastor Skeptical of Masks Lands in the ICU for Covid-19
https://amp.cnn.com/cnn/2020/09/17/us/idaho-pastor-covid-masks-trnd/index.html

A pastor in Idaho who called himself a "no-masker" during a service and repeatedly questioned the veracity of coronavirus case reporting is in the ICU after contracting Covid-19.

Paul Van Noy, senior pastor at Candlelight Church in Coeur d'Alene, has spent two weeks in the hospital with a Covid-19 diagnosis, ministry coordinator Eric Reade confirmed to CNN. Five other church staff were infected with coronavirus, too, but they've all recovered, he said.

In a July 22 service that was posted online, Van Noy said while he doesn't mind if other people wear masks, he didn't "want to be told" he needed to wear a mask.

“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.” ― Leonardo da Vinci

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late