Reinfected or false positive

In principle when someone tests positive but have no symptoms it is a false positive test. What is the proof that the test means anything at all?

 It just means that the person possibly has a certain RNA sequence in their body. 

And that may not even be true. With a 97% specific test, almost all the test results in most countries are true false positives, that means that the Covid Rna wasn't really in the persons body, but rather e.g. contamination from the previous test. 

With a 99.9 specific test and 0.01% infection in the population 14 of 15 positives are really false, there was no SARS COV2 virus in the person's body at all. 


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