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by jonahbenton 1793 days ago
Also, PCR is not one test, one method, one process. There are hundreds of distinct PCR-type molecular nucleic amplification tests. CDC guidance would only apply to the one process they provide/support. For a survey of the ecosystem and the difficulties in standardizing Ct values, see e.g.

https://www.aacc.org/science-and-research/covid-19-resources...