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Author Previous Topic: Supreme Court gave away half of Oklahoma today ... Topic Next Topic: Virus info ....  

Monadnock Hiker
Colonial Militia



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August 31 2017

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Posted - May 12 2020 :  08:32:12 AM  Show Profile  Reply with Quote
https://www.erinbromage.com/post/the-risks-know-them-avoid-them
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Commonality of outbreaks
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The reason to highlight these different outbreaks is to show you the commonality of outbreaks of COVID-19. All these infection events were indoors, with people closely-spaced, with lots of talking, singing, or yelling. The main sources for infection are home, workplace, public transport, social gatherings, and restaurants. This accounts for 90% of all transmission events. In contrast, outbreaks spread from shopping appear to be responsible for a small percentage of traced infections. (Ref)
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Importantly, of the countries performing contact tracing properly, only a single outbreak has been reported from an outdoor environment (less than 0.3% of traced infections). (ref)
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So back to the original thought of my post.
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Indoor spaces, with limited air exchange or recycled air and lots of people, are concerning from a transmission standpoint. We know that 60 people in a volleyball court-sized room (choir) results in massive infections. Same situation with the restaurant and the call center. Social distancing guidelines don't hold in indoor spaces where you spend a lot of time, as people on the opposite side of the room were infected.
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The principle is viral exposure over an extended period of time. In all these cases, people were exposed to the virus in the air for a prolonged period (hours). Even if they were 50 feet away (choir or call center), even a low dose of the virus in the air reaching them, over a sustained period, was enough to cause infection and in some cases, death



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Fitzhugh Williams
Mohicanland Statesman





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Posted - May 13 2020 :  06:12:58 AM  Show Profile  Reply with Quote  Copy this URL to Link to this Reply
Thanks. Good info.


"Les deux pieds contre la muraille et la tete sous le robinet"
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