#masks4all + #StayTheFuckHome => RO<1!

yyz67

Fractal Fanatic
#masks4all Masks might be CRITICAL element (not only element!) to reducing spread (even homemade ones) and enabling us to eventually go back outside and to work. Good evidence from other countries doing it. Let's get this out there and start doing it.

CDC: "In light of this new evidence, CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain (e.g., grocery stores and pharmacies) especially in areas of significant community-based transmission. Cloth face coverings fashioned from household items or made at home from common materials at low cost can be used as an additional, voluntary public health measure. The cloth face coverings recommended are not surgical masks or N-95 respirators. Those are critical supplies that must continue to be reserved for healthcare workers and other medical first responders, as recommended by current CDC guidance."

Research: Pharyngeal virus shedding was very high during the first week of symptoms (peak at 7.11 × 10^8 RNA copies per throat swab, day 4). Active replication in the throat was confirmed by viral replicative RNA intermediates in throat samples. Shedding of viral RNA from sputum outlasted the end of symptoms.

See also: #StayTheFuckHome

https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/
https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/

Summary and how to make a mask from a t-shirt (Lex Fridman):





Orig Czech masks4all video (Petr Ludwig, google doc: http://tiny.cc/masks4all):





Convincing Data Science (Jeremy Howard, papers: http://tiny.cc/maskswork):

 
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In a matter of a few minutes I made 4 masks from two t-shirts following the method in the first video (more-or-less).

I found I wanted more neck coverage so didn't cut below the neckline. To use, I flip them over with the straight part going around the nose. Tie the top "ties" around the head. The bottom ties can be tied to reduce exposure or left untied to eat, drink, or use a straw.

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The remaining "bottoms" could be cut or folded to add 1-4 more layers to the above (although breathing becomes difficult).
Or you can make a quick mask from them by folding in triangles like a bandana!

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So which scientifically acknowledged insititute and confirmed through scientific testing is claiming this? Before I'll die first before taking advice from someone onTwitTwat. If TwitTwat were to disappear today the world would immediately become a better place.
 
Yes: "My mask protects you, your mask protects me". Even homemade masks can reduce transmission (e.g. via droplets) by 3-10 times. There is probably also protection the other way. You are also less likely to inadvertently touch nose/mouth with a mask on, thus reducing your risk further.

https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/
https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/

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A couple data scientists looked at this in detail, esp. the radical reduction in new cases in those countries that have mandated the use of masks (in public). Of course there are additional KEY factors such as social distancing and hygiene. The way to lower R0 is doing multiple measures at the same time.

 

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it seems like a no-brainer to me...
Here in Germany, the advice is semi-official, even to use DIY-masks (there are Germany-specific legal issues that probably rule out an official guideline, "Vermummungsverbot" = prohibition to hide your face in public).
I've been wearing one for a long time, don't mind the weird looks I'm getting from little old ladies. The idea that it's (mostly) for their protection still has a long way to go here.
 
If nothing else masks prevent you from touching your mouth and nose. If you're wearing glasses as well, you can't touch your eyes either. I think the initial recommendation not to wear them was a well intentioned lie to prevent hoarding. I also heard that the WHO/CDC recommendation will change to "wear masks" once supply catches up. N95 probably won't be available, but surgical masks will be. FWIW I wore a mask on a grocery run today. It kinda sucks. Too hot, and if your breath smells even a little (which mine did, today), you'll know it.
 
initial recommendation not to wear them was a well intentioned lie to prevent hoarding.

Yes, and it was the right thing to do because if we lose more and more health care workers due to shortages...

FWIW I wore a mask on a grocery run today. It kinda sucks. Too hot, and if your breath smells even a little (which mine did, today), you'll know it.

Thanks from the public who doesn't know you are protecting them!

I did too today. I had a bandana for one store and the cut-up t-shirt for another. Both were uncomfortable and would fog my glasses but the t-shirt (doubled) was more breathable.

Only a few people had masks (Portland). But if it becomes more normalized (if mandated) it probably won't feel so bad as everyone's doin' it.
 
The NHS say that masks in isolation are not the solution. In many cases they make matters worse because users continually adjust them, touching their faces as they do so. When masks are worn for too long, or reused without sterilisation, they can harbour the virus and bring it into contact with your face. Also many mask designs, for example surgical masks, are designed as exhalation devices. They stop you passing on infection, but don’t stop you breathing it in.
 
Up to each us to decide as the recommendations are potentially all over the place right now,

But usage by masses in public may be significant.
 
A choir decided to go ahead with rehearsal. Now dozens of members have COVID-19 and two are dead:

The deadly outbreak among members of a choir has stunned health officials, who have concluded that the virus was almost certainly transmitted through the air from one or more people without symptoms.

https://www.cnn.com/2020/04/02/health/aerosol-coronavirus-spread-white-house-letter/index.html:

"While the current [coronavirus] specific research is limited, the results of available studies are consistent with aerosolization of virus from normal breathing," according to the letter, written by Dr. Harvey Fineberg, chairman of a committee with the National Academy of Sciences."​
(Thanks @Toopy14)
 
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honolulu mayor just asked everyone to wear a simple cloth mask when outside. FINALLY. if we all stop spitting on each other, the spread will decrease. common sense!
 
A website for those who still trust the authorities of the western countries and do not wear a mask:
https://wearafuckingmask.com/
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Now we just need Samuel L. Jackson to tell another bedtime story for the kids named "Wear A F*cking Mask!", as the second part of this one:
 
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Some science with graphs. From https://www.nejm.org/doi/10.1056/NEJMc2004973:

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From https://www.ncbi.nlm.nih.gov/pubmed/14631830:

Viruses stayed stable at 4 degrees C, at room temperature (20 degrees C) and at 37 degrees C [100 F] for at least 2 h without remarkable change in the infectious ability in cells, but were converted to be non-infectious after 90-, 60- and 30-min exposure at 56 degrees C [130 F], at 67 degrees C [150 F] and at 75 degrees C [167 F], respectively. Irradiation of UV for 60 min on the virus in culture medium resulted in the destruction of viral infectivity at an undetectable level.

CONCLUSION:
The survival ability of SARS coronavirus in human specimens and in environments seems to be relatively strong
. Heating and UV irradiation can efficiently eliminate the viral infectivity.
 
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"Viruses stayed stable at 4 degrees C, at room temperature (20 degrees C) and at 37 degrees C for at least 2 h without remarkable change in the infectious ability in cells, but were converted to be non-infectious after 90-, 60- and 30-min exposure at 56 degrees C, at 67 degrees C and at 75 degrees C, respectively. Irradiation of UV for 60 min on the virus in culture medium resulted in the destruction of viral infectivity at an undetectable level. "

90/60/30 minutes exposure at 56/67/75 degC. That is a lot of time at a very high temperature!

Better keep washing the hands and not touching the face after risk of exposure through surface

BTW, that paper on the stability of SARS Coronavirus is from September 2003
 
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