PCR test methodology (polymerase chain reaction test methodology), as predominantly used for Covid testing, has previously proven grossly unreliable / inaccurate... Case in point:-

In 2006 there was a pseudo-epidemic in a major US medical centre. It was a harbinger of the COVID-19 pandemic. From it, Big-Pharma learned how to create false demand for their vaccines.

Eight months after the alarm bell sounded that a fast-developing whooping cough (pertussis) outbreak was underway, an email was sent to all parties involved, informing that it was all a false alarm.

The error rate of PCR testing was 100%!

Almost 1,000 healthcare workers had been tested using PCR methodology, some were prescribed antibiotics, immunized and furloughed from work while they awaited test results. In all, over 130 health-care workers were informed they had pertussis, 1,300 contacts were prescribed antibiotics and more than 4,500 people (72% of the medical staff) were vaccinated. The med-centre infection control officers claimed success in quelling what turned out to be a faux-epidemic. ​

The New York Times, in a report entitled “Faith In Quick Test Leads To Epidemic That Wasn’t” reported on this pseudo-epidemic in 2007 - see: https://www.nytimes.com/2007/01/22/health/22whoop.html

Dr Trish M Perl, an epidemiologist at Johns Hopkins Medical Center, said pseudo-epidemics happen all the time. “It’s a problem. We know it’s a problem. My guess is that what happened at Dartmouth Medical Center in New Hampshire is going to become more common.” Dr Perl went on to say: “That leads to the question of why rely on PCR tests at all.”

And here we are, thirteen years later with the world battling against a coronavirus outbreak being confirmed by that same PCR methodology.

Also referenced in the med-centre's in-house journal: "Pseudo-epidemic Breakout In Major Medical Center" - see:
https://dartmed.dartmouth.edu/spring07/pdf/vs_cough.pdf