Posted on 04/09/2020 12:27:51 AM PDT by Helicondelta
This terrifying animation shows how coronavirus particles from a single cough can hang in the air "several minutes" and spread across two aisles of a supermarket.
Scientists created a computer simulation to study how far the virus can travel indoors - and worryingly found how a cloud of droplets will infect others even after the sick person has walked away.
“Extremely small particles of this size do not sink on the floor, but instead, move along in the air currents or remain floating in the same place."
(Excerpt) Read more at thesun.co.uk ...
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So again. It’s pointless to be locked down. We are destroying our economy for something that is out there already, and can’t be stopped.
And yet we’ve heard countless reports of where coronavirus outbreaks have happened and none have been in a retail store of any kind. Most don’t sell bat burgers.
brought to you by the same sci-tards who made the terribly incorrect death prediction models
what has happened to this country?
Okay, fine. But I would like to see such an animation that included various types of face masks. How much of a difference would they have made?
Not sensationalized at all. This simulation only shows multi micron sized droplets that only remain airborne for 15_20 minutes it does not show the sub micron aerosolized particles that are also infectious that stay in the air for an average of 3 hours. That will spread over the entire area and linger long after the infected leaves. With airborne virus the important metric is critical threshold of infection if you inhale viron particles in a concentration above this level you will get infected. There are three peer reviewed studies detailing this aspect of the SARS COVID 2 virus google scholar will gladly link one to it. For those wondering I am a professional scientist I do plume studies and environmental management for the oil and gas industry. This kind of modelling is my daily bread and butter nothing I saw in the background reporting shows error in this plume study and yes that’s a professional opinion. I hold 5 degrees in pure sciences three of them in earth and atmospheric sciences and two in geological sciences at the master’s or above. This bug is spreading via the air we breath particularly in closed spaces. NYC is a perfect example subway cars are the perfect means to have trapped air and people all sharing it for extended periods of time.
N95 masks filter 95 percent of all particles above 0.2 microns the typical human sneeze or cough produces a bimodial distribution of particles one peaks in the 5_10 micron range the others peak in the sub micron 0.1_0.5 micron ranges. With any airborne virus the metric to determine infection is called the critical threshold of infection above that viral load infection is unavoidable. The CDC current metric is 15 minutes of unprotected exposure to multi micron particles at 6ft or under concentration. Since an N95 mask gives only a 5% pass through rate the time to critical threshold is increased by up to 19 times. Ruffly 285 minutes to receive the same dose as an unprotected person in 15 minutes. This virus is communicable enough to infect via eye transmission of the same multi micron droplets so mask and goggles or a full face respirator is needed. These are for a single person shedding virus every additional person inside the same area doubles the concentration of airborne particles and halves the protection time of a rated N value of a mask. Science is all about metrics and numbers this bug has a minimum value for infection that scientists are struggling to find so the 2 meters /15minutes is just an educated guess.It’s likely much lower in time and longer in distances. China and Japan have studies up for review that show 4.5 meter confimed airborne transmission distances and timelinestimeline of over half an hour after an infected left an area to positive infection of a daughter case. These were confirmed by video evidence , contact tracing, and genetic sequencing of the host and daughters test cultures.
Short answer N95 masks work for the larger multi micron particles over a hours or more time. They are useless to more than half of the sub micron particles that stay airborne for on average of 3 hours in mild fluid motion more in more turbulent flows.
No, the virus will go exactly 5’ 11-3/4”, no more, no less.
The N95 mask filters down to 0.3 microns. For the normal flu, half of the particles from a cough are smaller than that. I don’t recall what size particles can hang in the air for the various times and what percentage they are. So a N95 only stops about 50% of the virus particles. But that is way better than nothing, and I wear one when I go shopping.
Although I guess for the smaller ones that hang in the air, those will accumulate as another infected person coughs or even just breathes.
The CV-19 virus goes into the lower lungs, so they are thinking the smaller particles can remain viral for awhile. With flu studies there are debates on how long the very small particles remain viable. The ones in droplets are protected by the droplets and the moisture. The smaller particles some believe they dry out and the virus is destroyed fairly quickly.
I like the way the virus cloud divides its forces into two columns and converges on the victim’s head along two inescapable lines of attack. Like it was some kind of smart bug that had graduated top of its class at West Point. These simulations are awesome. THERE IS NO ESCAPE! We’re all gonna die.
Thanks. Good - and important - information in your posts.
“Science is all about metrics and numbers this bug has a minimum value for infection that scientists are struggling to find so the 2 meters /15minutes is just an educated guess. It’s likely much lower in time and longer in distances.”
I think the scientists already know this - but it is also a social and political thing too.
Science advisor: “So based on our calculations, everyone must stay 25 feet apart and be in an enclosed space such as a store for no more than 12 minutes in order to stay below the threshold contact number.”
Politician: “That’s great for your lab experiment - you know how difficult that will be to enforce? We aren’t China where we can just weld people into their homes!”
I’m really glad that in a lot of places, most people are listening to the “social distancing” and staying at home. Not sure how long that can last though. I understand the need to flatten the curve, but I’m thinking once we get things slowly back to “normal” there will still be lots of people getting sick and dying. But at least the hospitals won’t be overrun - which is what the flattening the curve is all about.
I had to go out today and saw lots more folks wearing masks so that was good. I have been wearing my mask, googles, cap and trench coat since the beginning of March. At least now I’m not getting as many funny looks!
TXnMA
It spreads even faster if your day-shift nurse just got back from Wuhan.
LMAO exactly
I went out yesterday and about 33% of people were wearing masks.
Walmart had big double roll packages of toilet paper and most of the shelves were stocked. Still no flour or margarine though.
On fluid dynamics, I’d trust “sci-tards” over “spy-tards”. (See “Brownian motion”...)
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