Misuse of PCR underpinned the whole narrative. Its very high sensitivity and robotic acceptance as a gold standard created the illusion of many more cases (i.e. active infections) than were really present and prompted long quarantines, disrupting society and lives.
Tom Jefferson is a Senior Associate Tutor at the University of Oxford, a former researcher at the Nordic Cochrane Centre and a former scientific coordinator for the production of HTA reports on non-pharmaceuticals for Agenas, the Italian National Agency for Regional Healthcare. Here is his website.