"The genetic sequences used in PCRs to detect suspected SARS-CoV-2 and to diagnose cases of illness and death attributed to Covid-19 are present in dozens of sequences of the human genome itself and in those of about a hundred microbes. And that includes the initiators or primers, the most extensive fragments taken at random from their supposed "genome" and even the so-called "target genes" allegedly specific to the "new coronavirus".
Read a long article with excerpts of scientific studies, and references to them; https://www.greenmedinfo.com/blog/scam-has-been-confirmed-pcr-does-not-detect-sars-cov-2