Coronavirus, PCR test, part 1

As reported by CNN last year, “Polymerase chain reaction tests, known as PCR, are the most common and most accurate tests for determining whether someone is currently infected with the novel coronavirus.” Source.

Fact-checker Full Fact (itself sourcing a video recording) states that “Kary Mullis, the inventor of the PCR method” had once said that “with PCR, if you do it well, you can find almost anything in anybody”. Source. 

Okay then.