Why did PCR test inventor Dr. Kary Mullis come into conflict with much of the medical & scientific establishment?

Dr. Sam Bailey MD of New Zealand joins a growing international body of physicians, scientists, journalists, and even some statesmen who have expressed skepticism regarding official COVID-19 information and policy.

In this video, Dr. Bailey discusses PCR test inventor Kary Mullis, cancel culture, and COVID-19, and asks: What was Dr. Kary Mullis' background and why did he come into conflict with much of the medical and scientific establishment?