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Medicine Science

Preliminary Study Reveals How Long the Coronavirus May Linger On Various Surfaces (buzzfeednews.com) 142

An anonymous reader writes: The coronavirus appears able to linger in the air for up to three hours and on plastic and stainless steel surfaces for two to three days, according to laboratory tests run by a team of federal and academic scientists in the US. It's unclear whether the virus would behave the same way in the real world. The new study, published Tuesday, was uploaded to MedRxiv, a repository of early-stage scientific papers that have not yet been peer reviewed.

The new tests found that the ability of the novel coronavirus, also known as SARS-CoV-2, to stay in the air and on surfaces was highly similar to that of SARS, which is also caused by a coronavirus, according to the paper, which was done by researchers from the National Institutes of Health, the CDC, UCLA, and Princeton University. The scientists ran a battery of tests with a strain of SARS-CoV-2. They sprayed it into a rotating drum and measured how long it stayed in the air: three hours. They also deposited small amounts on plastic and stainless steel (up to two to three days), copper (up to four hours), and on cardboard (24 hours).
The CDC says person-to-person contact is believed to be the main way the new virus is transmitted, though transmission through contaminated objects and surfaces "may be possible."

Currently, the agency advises staying at least six feet away from people who are coughing and sneezing, and cleaning and disinfecting touched surfaces in household common areas, from sinks to light switches to tables.
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Preliminary Study Reveals How Long the Coronavirus May Linger On Various Surfaces

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  • Happily there is also a study [ssrn.com] that shows heat affects Covid-19 the same as it does for seasonal flus, which means that the virus simply will not last very long and thus have less of a chance to spread as temperatures increase across affected areas.

    • ...the virus simply will not last very long and thus have less of a chance to spread as temperatures increase across affected areas.

      I live in Canada, you insensitive virus!

      • by Mashiki ( 184564 )

        I live in Canada, you insensitive virus!

        It's okay, we just have to hope that it's a warm summer unlike last year's. The type that some /. posters don't believe happen, it's probably because they don't understand Canada is a land of extreme weather. It can be -35C with 10m snowfalls in Southern Ontario in the winter and 40C with 85-95% humidity in the summer.

    • by Miamicanes ( 730264 ) on Friday March 13, 2020 @12:46AM (#59825126)

      Unless you live someplace where there are lots of visitors from the other hemisphere... where July is the middle of winter, regardless of how hot & steamy it might be in Miami (Argentina, Chile) or London (South Africa, Australia), just to name two cities that have a relatively large number of visitors from somewhere in the southern hemisphere on any random day.

      This is part of the reason why it's not particularly uncommon for office workers in Miami and London to catch the flu in the middle of summer. The virus might not last long outside... but indoors, where it's air conditioned, relatively airtight, air is getting recirculated, and 30 degrees colder than outside... well, that's another story. Not to mention, the interiors of the air handlers and ductwork in most single-family homes (and, I suspect, way more commercial buildings than anyone wants to admit) are literal biohazards and petri dishes (hint: the oily brown goo that builds up and eventually clogs most air conditioner drain pipes in Florida isn't algae... it's a biofilm broth). I suspect this is the norm rather than the exception in most 'Alpha' world cities (including New York, Paris, Hong Kong, Singapore, Dubai, Tokyo, Shanghai, Beijing, Moscow, etc).

    • by rtb61 ( 674572 )

      Which means of course the far most likely place to catch the virus is well protected from environmental extremes, the supermarket and all of it's groceries and packages and of course the cash flowing through the till.

      All this hype about blocking transmission is looking as suspicious as fuck, you will get the contagion and most you will delay it but they way they rabbit on about isolating populations looks more like setting up the third world for a complete border shut down as the get ravaged by the worst va

      • All this hype about blocking transmission is looking as suspicious as fuck, you will get the contagion and most you will delay it

        Delaying is important. 10% or more of cases require hospital beds. The US has 2.8 hospital beds per 1000 residents. Spread it out as long and far as you can.

        When the number of cases exceed the healthcare capacity (see Italy) the actual mortality rate goes up. Pneumonia is not something that easily gets better without treatment.

  • Reports suggest Covid-19 could linger for up to 37 days in a person and spread. If true the quarantine length of 14 days is for core spreading but not exhaustive.
    • I'm going to rely on Hollywood, by doing a self-quarantine and only coming out 28 Days Later.

    • by gweihir ( 88907 )

      Current wisdom is that this can only be slowed down, not stopped. Hence quarantining people while they are most infectious is the way to go.

      This is all just to reduce the load on the medical infrastructure to avoid a situation like Italy where they currently are sending people over 70 and those with relevant previous conditions home, because they just do not have the means to treat them due to overload. (Italy has starved its health system to death over the last few years in addition, so they are as badly p

  • This is why brass doorknobs and handles are a good idea.

    • Better get out there and load up.

    • by Solandri ( 704621 ) on Friday March 13, 2020 @01:30AM (#59825194)
      Several metals exhibit anti-microbial and anti-viral properties [wikipedia.org]. It's probably the basis for the mythology of silver weapons being effective against evil creatures.
      • ... and maybe the idiom about newborn babies having silver spoons in their mouths. The metal will release some ions, providing some protection against infections.
      • The mythology of certain metals being proof against supernatural beings goes back further than germ theory.

        • The mythology of certain metals being proof against supernatural beings goes back further than germ theory.

          That in no way counters Solandri's guess. You don't have to know about germs to observe that a wound with silver pressed into is less likely to turn red and fill with pus than one that doesn't. I don't know if he's right, but your response isn't a counter.

          • If you pressed silver into a wound of a wounded werewolf and it prevented it from getting red and infected, wouldn't that be the opposite of what we are trying to say? Silver heals werewolves! Now we just need to find a werewolf and test this out. ;)

            Actually reading up... this guy did some great research it seems that the silver thing is only in the last 100 years or so!!! I had no idea:

            https://scifi.stackexchange.co... [stackexchange.com] ...start quote...

            "That connection, which is now an un-avoidable cliché, was m

    • by flyingfsck ( 986395 ) on Friday March 13, 2020 @02:05AM (#59825262)
      Yes, there has been numerous studies about hygienic surfaces and they all suggest that hospitals, kitchens and public areas should use copper surfaces, not stone, stainless steel or plastic.
  • Or six feet beneath?

  • 1 day shipping... lol
  • Disney announced that its parks will be closed for at least two weeks... possibly longer. If it looks like it'll be longer, I can DEFINITELY see Disney reopening with temporarily-increased ticket prices of $2,500/day (or $6,000 for a 3-day passport to all of their parks) and strict limits on the number of guests allowed (say, 5-10% their usual number).

    While that's a staggering amount of money to spend on admission, I suspect it would ironically end up INDUCING a few hundred thousand people who otherwise wou

    • by Kjella ( 173770 )

      Disney announced that its parks will be closed for at least two weeks... possibly longer. If it looks like it'll be longer, I can DEFINITELY see Disney reopening with temporarily-increased ticket prices of $2,500/day (or $6,000 for a 3-day passport to all of their parks) and strict limits on the number of guests allowed (say, 5-10% their usual number). While that's a staggering amount of money to spend on admission, I suspect it would ironically end up INDUCING a few hundred thousand people who otherwise wouldn't have gone within a hundred MILES of WDW to drop everything and run there for the once-in-a-lifetime opportunity to experience it with no crowds or lines.

      And they'd get massively chewed out in the media for encouraging lots of random folks to travel long distance to meet in one spot, to then disperse back into their community. Their brand is worth way more to them than that, they got the deep pockets to ride this one out. I suspect that there will be a lot of small businesses where the owners and employees are equally desperate, if they don't stay in business there's no money for anyone and a dead company's reptutation doesn't matter. They'll be the ones try

      • My argument is that by the time the first guest arrived, it'll *be* in nearly every community *anyway*, and the only remaining goal will be to slow its spread. By keeping guests relatively isolated from others & surrounding them with a moving bubble of disinfectant, they'd probably be *safer* than they'd be just going about daily life in any major city anyway.

        Disney could reduce the risk further by bundling a resort stay into the package, requiring a 2-3 day enforced quarantine at the resort with no sig

    • by spitzak ( 4019 )

      I don't see it. They would still need the employees, perhaps extra to do the sanitation you propose. And I would think they would worry a lot about liability if some guest caught the virus there despite their precautions.

      • Liability would kind of be a dice roll. If Disney opened the parks against official advice, that might expose them to liability. If the Florida legislature quickly passed a law granting safe harbor to venues that follow a specific laundry list of best practices (under threat of mass layoffs by Disney if they didn't, and quickly), Disney is probably in a better position than anyone to actually IMPLEMENT a big laundry list of best practices.

        Make no mistake... in Florida, the Mouse gets pretty much whatever it

  • I read that in Hong Kong, they were worried about the spread through sewer pipes [businessinsider.nl]. In many houses, there is a discharge pipe, which allows air to escape. If - and I have seen this in practice ! - you push a gas through the toilet on the ground floor, the gas finds it's way through the discharge pipe on your roof and you see smoke pillowing out if that gas is visible. However, the gas *also* finds it's way to the neighbours' house. So: same for that gas, any sewer gas that contains SARS-CoV-2 (which causes CO
    • Most if not all sewer systems have "pipes out the roof". It's to prevent siphoning when you flush your toilet. You don't want the water in your traps to siphon out (or evaporate). The scent is....invigorating.
    • by spitzak ( 4019 )

      An open pipe to the roof is a required feature of sewer systems, you need air to fill the pipes so the sewage goes down. These pipes are in American homes and buildings too.

  • They didn't test paper money, but it's probably a lot like cardboard. Dollar coins aren't pure copper, but the various coin alloys contain copper and probably have similar antimicrobial properties. If ever there was a time to get the American public turned on to Dollar coins, it's now.

    • by dargaud ( 518470 )
      The chinese replaced most of their paper money very quickly.
    • by Misagon ( 1135 )

      Tests with droplets with bacteria on paper money have shown that survival of the bacteria differs a lot between different materials. Some bacteria lived longer on US Dollar bills (75% cotton, 25% linen) but other bacteria live longer on Euro bills (lacquered cotton).
      However, all tested bacteria lived the longest on plastic notes (Australia, UK, Romania).

      I suppose it a issue of how much the material will absorb and distribute moisture. If a droplet dropped on a material spreads out across the material, it co

  • Sneezing? (Score:4, Interesting)

    by Psychotria ( 953670 ) on Friday March 13, 2020 @05:19AM (#59825416)

    Sneezing isn't a symptom of COVID-19 (or even the flu). If someone is sneezing they are likely to have a cold (or allergy) rather than COVID-19 or the flu.

    https://www.health.harvard.edu... [harvard.edu]
    https://imgur.com/a/x4H4bDo [imgur.com]
    https://edition.cnn.com/2020/0... [cnn.com]

    • Re: (Score:3, Informative)

      In general it is a good idea to avoid people SNEEZING AND COUGHING no matter why virus strain is going around. People are so dumb. All of these "precautions" should be done regularly. Wash your hands. Avoid sick people. Clean surfaces.

      • To hell with that, survival of the fittest, it is about tim.. *cough* #@*&$%& *cough* ...@#($&^$(#&^ [connection disconnected].
    • by fazig ( 2909523 )
      People already avoid other people who are showing any symptoms that make them look sick long before this happened.

      Sneezing, coughing, runny nose, excessive sweating, skin irregularities like rashes or blisters and so forth would be common causes for people to feel some kind of disgust and rather keeping their distance.

      An underestimated problem is probably when infected people do not show any noticeable symptoms. Which reminds me of a line from The Big Bang Theory when I still considered it to be somewha
      • To be honest I don't even want a cold because a cold can be pretty annoying. But spreading disinformation annoys me. The disinformation is so bad that Wikipedia even lists the influenza as a cause of the common cold (it's not). I'm not even going to try and fix the Wikipedia page though because the conflation between a cold and flu is so entrenched in the vernacular that my edit would be reverted immediately.

        In my experience sneezing, coughing, runny nose, excessive sweating etc are not enough to cause alar

        • by fazig ( 2909523 )
          It is definitely stigmatization, but that doesn't change that this is widespread human behaviour from all that I have seen in society here in Europe. You don't get chummy right away with someone who looks infectious despite them maybe just suffering from allergies. If you act differently, you'd be the outlier.
          Most people are just that superficial and tend to judge others by their appearance since that is the first thing their senses tell them about someone else. A bit more understanding may happen later af
    • You can have more than one disease at a time. In fact, having a cold or allergies where you are blowing your nose and rubbing your itchy eyes increases your chance of contracting another disease.

      Someone with COVID19 and allergies or a cold would be an excellent transmission machine, spewing virus laden mucus all over the place.
    • If someone is sneezing they are likely to have a cold

      About 10% of common colds are coronaviruses. Not COVID-19 obviously.

  • Dozens of viruses and bacteria were found on 1$, 10$ and 20$ bills, DNA tests showed fecal bacteria of dozens of people, horses, cats and dogs and even, for some strange reason, a northern white rhinoceros.

    They didn't check bigger bills, I guess because like Kim Jong-il, rich people don't go to the toilet, they work it out, for the good of the people.

    PS. It also means the Germans are doomed.

  • Heat is a great unraveler of things like proteins and.. maybe viruses? Would running your paper currency under a hot iron affect covid viruses? Might be a way to tame filthy lucre, and slow the spread.
    • That's a bit of an overcomplication when you could just use a debit card.

      • As a society, we need to slow the spread. Money is still a thing, and wont be going away for all. If you were everyone... it might be a complication, but money is still in circulation and is a transfer vector. Everything we can do to slow the spread will make it more manageable.
    • Sanitizing your cash in the clothes washer would give new meaning to the phrase, "money laundering"...

  • SPANISH flu....MERS (mid east respiratory syndrome), SARS (South Asia Respiratory syndrome) EBOLA (named for the Ebola river...means black river). But! If we call this CHINESE virus anything with CHINESE in the name, WE are "racist". I call it the Wuhan coronavirus until I can come up with something like CARS (Chinese-Asian Respiratory syndrome).

"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." -- Bertrand Russell

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