Kary Mullis, inventor of the PCR technique, said it was never meant for diagnostics, and would be a shit tool to used as such. Unfortunately, he died in August 2019, right before covid.
Here is an article by fact-checkers declaring that he never meant what he said, cuz, fuck it we fact checked it and he dead, so he can't argue back.
They sure did try to smear him, didn't they? He basically said Fauxi was a POS.