Recently I saw the local media (Romania) presenting a case that was initially considered COVID-19 positive and two subsequent tests led to negative results. As far as I know no official bothered to offer an explanation and I assume that this is expected in some cases (e.g. initial test was not done correctly).
Like any other tests, I expect to have an accuracy < 100% and I am wondering what that accuracy is for current tests.
I have read here about the issues with US tests and this article shows how tests are done in China:
(..) the main way to test patients is using the Reverse Transcriptase Polymerase Chain Reaction (RT-PCR) technique.
This paper deals with RT-PCR accuracy, but I cannot understand its conclusions.
By accuracy I mean (total tests - false positives - false negatives) / total tests.
Is there any figure about the accuracy of COVID-19 tests?
