Again, the withdrawal of one EUA for one PCR test does not affect all other PCR tests.
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I don’t need to read it. There is no isolated reference sample. that is all.
and
"No purified samples of the Covid-19 virus exist."
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These claims are half right. There was no sample available for that one test at that time. The virus had already been found and isolated in a lab. It simply took time to get samples to other labs and for other labs to isolated it.
This is using one source of information selectively while ignoring others.
The document "CDC 2019-Novel Coronavirus (2019-nCoV) Real-Time RT-PCR Diagnostic Panel" was first published on Feb 4, 2020.
From the National Center for Biotechnology Information, one of the early studies to isolate Covid: Identification of Coronavirus Isolated from a Patient in Korea with COVID-19, Feb 11, 2020.
It took time to isolate and distribute the virus, and emergency procedures are emergency procedures, last resort, not the preferred method. Again, this was a early emergency procedurea and the CDC admitted all the problems this one procedure had up front. It did not mean that doctors were required to use ONLY this one test either.
So did that document, when there was not much to go on, prevent anyone from later on isolating the virus afterwards?
There are 280 PCR tests. Are you claiming that problems with one are binding on all others that came afterwards?
What is your basis to say that a lack of a reference sample makes the test entirely useless, as well as all other tests that came later?