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Author | Topic: Coronavirus and Pandemics | |||||||||||||||||||||||||||||||||||||||
Chiroptera Inactive Member |
Or so our Constitutional Originalists would tell us.
But [Frederick] Douglass was not gone; he was merely dead. -- David W. Blight
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Faith  Suspended Member (Idle past 1475 days) Posts: 35298 From: Nevada, USA Joined: |
Here's what I got back.
There are several recommended filters. I got Filtrete 2200, but they say anything above 1500 is ok. Filtrete and others make a hepa filter, but I couldn’t find any. Filters are usually solid by type, so get the largest one available. I bought two 20 x 25. They have a wire mesh like chicken wire glued to them and it’s very easy to get poked by it.These filters are really put together with a lot of glue so use a pocket knife so you don’t destroy the material.. To a second question I asked:
The one I got says it filters out bacteria, pollen etc, ... The average filter is 600 - 800, which refers to density Here's a You Tube page on making masks:https://www.youtube.com/results?search_query=How+to+make+... Edited by Faith, : No reason given.
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JonF Member (Idle past 198 days) Posts: 6174 Joined: |
There's competition with originalism on the right. Common-Good Constitutionalism - The Atlantic:
quote:
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Percy Member Posts: 22506 From: New Hampshire Joined: Member Rating: 5.4 |
Thanks for the info. Oddly, Home Depot is out of stock of all highly rated furnace filters while Lowe's has plenty in stock.
--Percy
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AZPaul3 Member Posts: 8564 From: Phoenix Joined: Member Rating: 5.1 |
When you cough you send out a pray of droplets at high velocity. These droplets fall away rapidly but can extend quite far. An asymptomatic carrier, not knowing they are infected, without a mask can put out quite a spray. With a mask, however, if not fully contained, the spray would be considerably less. How considerably I have no idea but I can imagine the velocity of the droplets through/around the mask to be a small fraction of the initial speed and would fall away within inches, not feet. The contagion is limited to the surfaces of the immediate surrounding area like hands, door handles, shopping carts, etc.
The uninfected person does not need a mask to keep out the virus since the virus, so we understand, does not aerosolize over distance, thus the 6 ft rule. The rest of the protocol involves touched surfaces. That is where washing hands, hand sanitizers and keeping your fingers out of your nose comes in. That leaves the case of the asymptomatic carrier not wearing a mask as a growing vector of infection as the virus spreads to a larger share of the population. In Arizona, the incidence of disease is still small, but growing. As more become asymptomatic carriers I can see the utility of everyone wearing masks since this 6 foot rule is rather fuzzy and not really achievable for every interaction in a growing base of asymptomatic carriers. New York and the like should be doing this now. As in right now! The problem I see is that there are not enough effectively functional masks. A home industry is born. Local seamstresses making masks for friends, family and profit. I can also see where even cloth masks, less than HEPA/FDA effective, could be better than nothing given the circumstances. They can still be effective in keeping spewed droplets out of your mouth/nose unless you get in the direct line of fire of a full blown salvo from some ignorant negligent asshole. Which brings me to the reason I’ve written this much so far. Other than just self-quarantine boredom. Cloth masks are not one-use items. Even the standard surgical masks we bottom-feeders of society can no longer get are put into multi-use mode these days. So how do we clean them? My idea is to dampen the mask, not drench it but just dab it, with a clean sheet of paper towel wet with ethanol then seal it in one of those zip-like baggies and let it fumigate for a day or two. Would this work? I know ethanol in the guise of rubbing alcohol is as scarce as surgical masks and Lysol-like sprays in your local grocery/pharmacy store but for those who don’t know Everclear 190 proof grain alcohol (95% ethanol) is still available, at least in Arizona, in your local liquor store for about $25 a fifth (750 ml). Edited by AZPaul3, : No reason given.Eschew obfuscation. Habituate elucidation.
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AZPaul3 Member Posts: 8564 From: Phoenix Joined: Member Rating: 5.1 |
Percy is right.
Everyone needs to mask. Even a simple cloth mask. New CDC recommendation. White House Debates How Far to Go on Face Mask Guidelines - The New York Times
quote: Edited by AZPaul3, : No reason given. Edited by AZPaul3, : No reason given.Eschew obfuscation. Habituate elucidation. |
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Percy Member Posts: 22506 From: New Hampshire Joined: Member Rating: 5.4 |
AZPaul3 writes: Cloth masks are not one-use items. Even the standard surgical masks we bottom-feeders of society can no longer get are put into multi-use mode these days. So how do we clean them? My idea is to dampen the mask, not drench it but just dab it, with a clean sheet of paper towel wet with ethanol then seal it in one of those zip-like baggies and let it fumigate for a day or two. Would this work? I've never worn a standard surgical mask so I don't know what they're like. If they're cloth then they should survive ethanol fine. If they're more a paper product then I don't think they'd hold up very well. But you might not need ethanol if it's true that the virus dies by itself outside the body, depending upon type of surface, 24 hours for cardboard, up to 72 hours for polypropylene plastic and stainless steel. We've been cycling our masks, using one and then letting it sit untouched for three days in the garage. Wear and tear on our masks is not great because we never wear them for more than a couple hours. What I've read about mask reuse was specific to N95. I think I posted this before, but it doesn't hurt to repeat it. A significant portion of N95's effectiveness against actual virus (rather than virus contained in droplets) is an electrostatic property. Isopropyl alcohol greatly diminishes the electrostatic quality, and getting wet also significantly degrades the masks physical stiffness. I think the article I read said about 5 treatments with alcohol was the limit. About the aerosol qualities of exhalations, coughs and sneezes, my own opinion is that they all include droplets and air that vary from large droplets containing entire flora all the way down to mere individual molecules, bacteria and virus. I haven't seen my view shared by anyone else, either here or in the press, but if we don't breath out a wide range of sizes of "stuff" then I'd need it explained to me by someone knowledgable why that doesn't happen, and even then I might not believe it. Also, one investigation I read about found detectable levels of coronavirus persisting in the air for up to 30 minutes after aerosolizing. AbE: From This is How Long Coronavirus Can Survive on Plastic, Cardboard and in the Air:
quote: --Percy Edited by Percy, : AbE.
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AZPaul3 Member Posts: 8564 From: Phoenix Joined: Member Rating: 5.1 |
Some new info on the subject.
Should you wear a face mask to prevent COVID-19? | Live Science
quote: Still, I think you are right given the spread of asymptomatic carriers. Everyone, especially in hot spots, needs to mask when in public. I like the "hang it on a hook for a few days before reuse" advice. Thanks for the response.Eschew obfuscation. Habituate elucidation.
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frako Member (Idle past 336 days) Posts: 2932 From: slovenija Joined: |
Um sure a mask can protect you from a sneeze from an infected person. But the amount of time booger droplets stay in the air is small. And when you hear someone coughing or sneezing you run the other way. Thing is it would be better for the infected person to wear the mask so that everything around the infected person doesn't get covered by virus infested mucus, you touch that then rub your eye and your infected and your mask dint do you any good.
That being said for this reason my country has decreed that you have to cover your mouth and nose with something when going shopping. Scarf, mask, bandanna, doesn't matter as long as it keeps your virus infested mucus from going everywhere. They don't let you in otherwise. You also get free gloves in front of shops and every cart is sanitised. Just a few days ago we implemented some draconian movement regulations. Basically you cant go out of your county if its not for a good reason. Job, taking care of your grandparents you know sensible things, dunno how a cop would check your reason i think its manly for show to keep people home. but i still don't like it We got a linear growth of infections. By an average of 40 per day. Some days more some days less. We tested about 1,2 % of our population. We have 900 infected, and 17 dead. Christianity, One woman's lie about an affair that got seriously out of hand What are the Christians gonna do to me ..... Forgive me, good luck with that.
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Coragyps Member (Idle past 765 days) Posts: 5553 From: Snyder, Texas, USA Joined: |
Spitballing again, but it seems that thirty minutes in 150F/65C oven would sterilize a mask pretty well. A paper or cotton mask, anyway - one that would partially melt wouldn’t do so well.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.5 |
According to Ars Technica testing in the US has been hovering at about 100,000 a day since 27th March.
The increase in reported infection rate is not due to more testing, but due to a greater proportion of positive results. This is very bad news for the US. Edited by PaulK, : No reason given.
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Faith  Suspended Member (Idle past 1475 days) Posts: 35298 From: Nevada, USA Joined: |
Nevada governor Thursday reuested (required?) that everyone wear something covering the face when leaving the house, a mask, a bandanna, anything. Homemade masks are becoming popular I understand, using patterns that can be found online, especially at You Tube, which I linked above to Percy.
Many of the grocery stores here are letting people in according to a certain predetermined number so that there are long lines forming outside. They have also painted yellow lines six feet apart to keep everyone at the prescribed social distance, both in the outside lines and in the lines at checkout, not sure where else. As for spreading the virus through the air, I heard weeks ago that you don't even need to cough or sneeze to spread it, that merely breathing, talking etc, puts it into the air where it remains for something like three hours. This isn't talking about heavy droplets, but very fine mist. Edited by Faith, : No reason given.
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dwise1 Member Posts: 5952 Joined: Member Rating: 5.7 |
Spitballing again, but it seems that thirty minutes in 150F/65C oven would sterilize a mask pretty well. A paper or cotton mask, anyway - one that would partially melt wouldn’t do so well. Somehow today I caught mention of UV irradiation as a sterilization method. A few or more years ago, I saw an advert about a UV container for one's toothbrush for the same effect. No idea what it would take to obtain that.
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14174dm Member (Idle past 1139 days) Posts: 161 From: Cincinnati OH Joined: |
Would microwaving destroy virus? I could see killing celled organism by boiling interior liquid but virus is just string of DNA.
Edited by 14174dm, : Mis spelling
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caffeine Member (Idle past 1055 days) Posts: 1800 From: Prague, Czech Republic Joined:
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Would microwaving destroy virus? Don't know, but it would likely incinerate the cotton mask. Not sure why you're all finding the question of sterilisation so complicated. Use boiling water.
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