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20 April 2020

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scenes

Speaking of 'test positives' and the like, I have to wonder if there isn't a half-life for the efficacy of a test (in addition to immunity and vaccine efficacy)

https://www.scmp.com/news/china/science/article/3080771/coronavirus-mutations-affect-deadliness-strains-chinese-study

George Rebane

scenes 1140am - not sure if your "efficacy of a test" really means the re-emergence of C19's virulence (e.g. thru mutation), or if you're talking about the shelf-life of a given test in that its sensitivity and specificity would degrade over time.

scenes

"you're talking about the shelf-life of a given test in that its sensitivity and specificity would degrade over time."

this.

It strikes me that a half-life is a good way to think about it.

scenes

...and by that I mean that the virus changes, not that the tests go bad in storage or the like.

Bill Tozer

Lockdowns Don’t Work

https://www.thepublicdiscourse.com/2020/04/62572/

Already reports from ‘experts’ claim of those with COVID-19 antibodies is are understated by a factor of 55-80x. Herd immunity is here.

scenes

Speaking of tests and pulse oximetry, a not bad article.

https://www.nytimes.com/2020/04/20/opinion/coronavirus-testing-pneumonia.html


Of course, the net result of all the words is that it's useful to give people supplemental oxygen and to have them on their side or stomach in order to avoid a ventilator.

The gobsmacking angle to this is that it's probably the dozenth article I've read with the miraculous discovery of positioning patients with breathing problems. (a) it's obvious and (b)you'd think they already know all of this. The simple fact that coronavirus appears to cause relatively asymptomatic lack of takeup of oxygen should have been common knowledge in the medical community in December.

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