This is somewhat old news, but I failed to report it here:

The PCR test “is unable to determine, beyond reasonable doubt, that a positive result corresponds, in fact, to the infection of a person by the SARS-CoV-2 virus”, said the Lisbon Court of Appeal.

This is the ruling of the court. The news has been reported also by the Italian National Order of Biologists.

The ruling cites two main papers:

This is not news. Lots of scientists and doctors around the world know about the problems with mass PCR testing.

Recently, 22 scientists published an external peer review of the publication entitled “Detection of 2019 novel coronavirus (2019-nCoV) by real-time RT-PCR” (Eurosurveillance 25(8) 2020), which formed the basis for worldwide mass PCR testing. The scientists have highlighted 10 major flaws in the original paper.

Other resources about PCR can be found on this site.

These two articles, however, remain a good start:

And remember: PCRs are not a diagnostic tool.