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Monadnock Hiker
Colonial Militia
Bumppo's Patron since [at least]: August 31 2017
Status: offline
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Posted - May 12 2020 : 08:32:12 AM
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https://www.erinbromage.com/post/the-risks-know-them-avoid-them . Commonality of outbreaks . . 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) . 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) . . So back to the original thought of my post. . 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. . 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
Bumppo's Patron since [at least]: July 17 2005
Status: offline
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Posted - May 13 2020 : 06:12:58 AM
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Thanks. Good info. |
"Les deux pieds contre la muraille et la tete sous le robinet" |
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