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In context, Dr. Mullis is not speaking about using PCR to diagnose SARS CoV-2, but rather about using it for diagnosis of anything.
Regarding Dr,. Anthony Fauci, “He [Fauci] he doesn’t know anything about anything and I’d say that to his face.” Kary Mullis, the Nobel Prize winning inventor of the PCR test has also maintained that the test was never meant to be a diagnostic tool and does not measure viruses.
What was Dr. Karry Mullis’ background and why did he come into conflict with much of the medical and scientific establishment?