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Old 11-30-2020, 09:15 PM
 
17,619 posts, read 13,410,543 times
Reputation: 33089

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MIT researchers have built a simple tool to give clear guidelines on indoor safety in the midst of a pandemic.

Quote:
So are any of us safe indoors during the COVID-19 era? Can we go to a grocery store? Can we meet with a loved one? Bush, alongside his MIT colleague Martin Z. Bazant, have answered that question with a complex mathematical model, which simulates the fluid dynamics of virus-loaded respiratory droplets in any space, from a cozy kitchen to a gigantic concert hall.


And because the equation is far too complicated for most people to understand, they turned their findings into a free online tool. Go to this website, and you can create your own custom scenario to judge COVID-19 risks for yourself.

This answers a lot of questions that have been posted here for the past 9 months

 
Old 12-01-2020, 05:41 AM
 
Location: Redwood City, CA
15,253 posts, read 12,997,615 times
Reputation: 54052
Hi Mike,

I found this tool confusing.

It seems to have this baked-in assumption:

Note that the six-foot or two-meter distancing guideline would indicate that up to 2 people would be safe in this room for an indefinite period.

I'm concerned about an indoor situation in which the two people would have to be closer than six feet because one of them is a doctor treating the other. Specifically, a dermatologist doing a skin check on a patient. That procedure could easily take more than 15 minutes.
 
Old 12-01-2020, 05:53 AM
 
Location: On the wind
1,465 posts, read 1,087,175 times
Reputation: 3577
Like many of these "calculators", too many assumptions! Entertainment use mostly!
 
Old 12-01-2020, 07:44 AM
 
Location: Central Florida
3,264 posts, read 5,011,288 times
Reputation: 15037
To me it just demonstrates how complicated this whole business is.
 
Old 12-01-2020, 10:04 AM
 
4,038 posts, read 1,889,869 times
Reputation: 8696
Boeing 737 - interesting, and rhymes with previous data.


Most domestic flights aren't a huge vector of transmission.
 
Old 12-01-2020, 04:34 PM
 
Location: Central IL
20,722 posts, read 16,412,657 times
Reputation: 50386
...be sure to look at the "human behavior" tab - it defaults to people being at rest, only whispering, and wearing masks...so going to a fitness class with no masks would make a big difference, e.g.
 
Old 12-02-2020, 10:15 AM
 
4,038 posts, read 1,889,869 times
Reputation: 8696
I'm surprised more people aren't commenting on this - seems cool!


It may be counter intuitive in some cases - but - without using your intuition and ONLY using reported data - it actually rhymes up pretty nicely.


And, well, it does have science on its side. The Virus (and the air it travels with) isn't magical.
 
Old 12-02-2020, 05:41 PM
 
Location: equator
11,083 posts, read 6,674,854 times
Reputation: 25604
Quote:
Originally Posted by fluffythewondercat View Post
Hi Mike,

I found this tool confusing.

It seems to have this baked-in assumption:

Note that the six-foot or two-meter distancing guideline would indicate that up to 2 people would be safe in this room for an indefinite period.

I'm concerned about an indoor situation in which the two people would have to be closer than six feet because one of them is a doctor treating the other. Specifically, a dermatologist doing a skin check on a patient. That procedure could easily take more than 15 minutes.
Yeah, I didn't see "hospital room" on there. What if you are in one for a few days with masked staff bustling in and out and getting up close and personal... but only a minute or so each time....

Is that chart assuming everyone is masked, or not?
 
Old 12-02-2020, 09:44 PM
 
Location: Redwood City, CA
15,253 posts, read 12,997,615 times
Reputation: 54052
Quote:
Originally Posted by Sand&Salt View Post
Yeah, I didn't see "hospital room" on there. What if you are in one for a few days with masked staff bustling in and out and getting up close and personal... but only a minute or so each time....

Is that chart assuming everyone is masked, or not?
Under the Human Behavior tab, you can set whatever kind of mask you want or none at all. Everything from None (Face Shield) with efficiency of 0% to N95 Respirator with efficiency of 95%.

I don't see any setting for the cheap procedure masks so many people wear, fooling themselves into thinking they're surgical masks and therefore offer some protection.

Remember that the prison guard who got COVID from very short exposures to six inmates he was processing for intake was only wearing a microfiber mask, not a respirator. And for part of the time he was interacting with the inmates, they weren't wearing masks (nor were they required to). It turned out he had had 17 minutes of cumulative exposure during one day and all six of the inmates were infected.

Last edited by fluffythewondercat; 12-02-2020 at 10:01 PM..
 
Old 12-03-2020, 06:30 AM
 
21,382 posts, read 7,969,646 times
Reputation: 18157
Quote:
Originally Posted by roodd279 View Post
Boeing 737 - interesting, and rhymes with previous data.


Most domestic flights aren't a huge vector of transmission.
Amazing isn't it that flights are happening everyday, no shutdowns. Huh. I guess COVID is afraid of flying?
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