I’m just stating facts about how PCR tests work. The CDC is very careful not to lie directly; they just avoid stating accurate facts and the media/PR people spin a boiled down version that isn’t accurate.
If you drill down and understand the substance matter, they warn not to use the new test for diagnostics and the Flu and COVID multiplex tests are indeed separate tests within the same assay.
The reason I say what I say, is because I have experience and multiplex assays are relatively new, they generally have poor specificities and preferential amplification. Also, some people related to the current administration happen to be shareholders in some of the patented technologies.
You can technically analyze the data and find out the likelihood (% confidence) that the test has a specific occurrence, but that’s not what they’re designed to do and analyzing data is really expensive (makes sense for research purposes, not for public health).
They’re designed, as the CDC says, just as the current tests, to establish either a quick and dirty selection (better safe than sorry method) or as a tool to assist in diagnostic testing.