Posted on 08/26/2020 7:20:01 PM PDT by dynachrome
Environmental samples Apartment 2020/Feb/14 SARS-CoV-2 was detected in surface samples (e.g. sink, faucet, and shower handle) of the restroom in a long-term vacant apartment at 16-floor, which is right above the restroom of an apartment with five persons with COVID-19 (confirmed between Jan 26 and 30) at 15-floor in Guangzhou. The possibility of aerosol diffusion through sewage pipe after flushing the toilet at the 15-floor restroom was further confirmed by an onsite tracer simulation experiment showing aerosols were found in the restroom of apartments at 25-floor (two cases confirmed on Feb 1) and 27-floor (two cases confirmed on Feb 6 and 13) China Unpublished data of China CDC Lab 2020/Mar/17 SARS-CoV-2 remained viable in aerosols throughout the duration of experiment (3 h) USA NEJM (van Doremalen et al., 2020) Lab 2020/Apr/13 SARS-CoV-2 maintained infectivity in aerosols for up to 16 h USA Emerg Infect Dis (Fears et al., 2020) Hospital 2020/Feb/25 SARS-CoV-2 was detected on the surfaces of the nurse station in the isolation area with suspected patients and in the air of the isolation ward with an intensive care patient at the First Hospital of Jilin University
(Excerpt) Read more at sciencedirect.com ...
The excerpt is near the bottom of the article. Much eye-glazing science stuff before that.
Aside that, if the traps in the toilet and sink went dry...maybe.
More likely that vacant apartment was a shooting gallery or had squatters.
Yeah, those people are known for their good hygene. s/
I remember an article or two a while ago (March?) which said that the covid stayed on surfaces for up to 14 days. But later it was shown that it was just remnants of the virus that were detected and were not infectious. Don’t know how these experiments or results compare - I don’t have time to read the whole article.
Also, I notice this is from the November 2020 issue of the journal, so maybe a little time-travel is occurring here as well. :)
“Seems to be China related, so reliability? “
Hong Kong concluded the same, long ago. It will move through sewage systems and aerosol transmission.
Nothing new here.
Positivity
From the made up medical term Positivity Rate, which was coined by CNN about May 2020.
Yup, any plumber can debunk this buy explaining how a trap works.
There is some limited evidence for the theoretical possibility for aerosolized transmission of SARS-CoV-2, but based on its R0 of approximately 2.5, there’s no way that’s a primary vector. If it happens at all, it’s likely quite rare. Same with fomites. Respiratory droplets appear to be the primary transmission vector.
Reduce the volume and range of droplets, reduce the chances of spread. Easy enough to do. Stay away from crowds, especially indoors. While indoors in public, mask up. Go outside and enjoy yourself all you like. Do that and the spread will be minimized overall.
The distinction between “droplet” (6 feet) and “airborne” (more than six feet) is more of a fuzzy line.
Most classic “airborne” diseases (Measles, for example) have very high attack rates at long distance and therefore airborne spread is easily proven.
SARS CoV 2 does not appear to have a high attack rate at a distance, AND there is a fraction of the population of unknown size with innate resistance, so true airborne spread is hard to demonstrate.
Also, the role of modern HVAC systems in concentration and spread is poorly understood.
What is certain is that viral RNA from SARS CoV 2 has been detected in air samples quite far away from infected people, and that it remains there for long enough, to qualify as “airborne spread”.
Q: Was what was present infectious?
If not....meh.
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