The problem with the PCR test is that if they run too many amplifications you can get a positive for almost anything for example fragments of a cold virus you have had weeks ago.
I read where in the UK they found that only one of a hundred positive tests actually had covid.Problems With Antibody Tests
There have been problems with COVID-19 antibody tests from the start, in part because it may turn positive if you have antibodies against common cold viruses. There are seven different coronaviruses that cause respiratory illness in humans. Four of them cause symptoms associated with the common cold, while three of them — SARS-CoV, MERS-CoV and SARS-CoV-2 — can cause more serious respiratory illness.
However, the antibodies created by these coronaviruses are very similar, and the U.S. CDC admitted that recovering from the common cold can trigger a positive antibody test for COVID-19, even if you were never infected with SARS-CoV-2 specifically. According to the CDC:20
“A positive test result shows you may have antibodies from an infection with the virus that causes COVID-19. However, there is a chance that a positive result means you have antibodies from an infection with a different virus from the same family of viruses (called coronaviruses).”
“A positive test result shows you may have antibodies from an infection with the virus that causes COVID-19. However, there is a chance that a positive result means you have antibodies from an infection with a different virus from the same family of viruses (called coronaviruses).”
Don’t Use Antibody Tests Post Vaccine to Determine Immunity (mercola.com)
