If Dr Yeadon was correct, then false positive should be high (they are not actually false positives, they are non infections positives with no virus but with fragment RNA in his explanation) , and repeat tests of those false positive should also be positive. However, in cohorts where repeat tests are taken (Care home workers and residents, previously positive patients awaiting hospital discharge) we find that after around the expected period 10-14 from first positive test, we get these all these cases giving negative results.