Andrew Wakefield lost his medical license after his study linking vaccines to autism was discredited and retracted.
Andrew Wakefield lost his lisence after his study on autism

Andrew Wakefield - Wikipedia
Source: en.wikipedia.org
Key Evidence
The Lancet retracted Wakefield's paper in January 2010 after investigations revealed serious ethical violations and data manipulation.
The UK's General Medical Council revoked his medical license due to professional misconduct related to the study.
Wakefield remains barred from practicing medicine in the UK and is not licensed in the US.
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What the Evidence Shows
Andrew Wakefield published a 1998 study in The Lancet that suggested a link between the MMR vaccine and autism. This study was later found to be fraudulent and unethical. Following investigations by the UK's General Medical Council (GMC), Wakefield was found guilty of professional misconduct, including dishonesty and abuse of developmentally challenged children involved in the study.
As a result, in 2010, The Lancet formally retracted the paper, and Wakefield was stripped of his license to practice medicine in the United Kingdom. He is barred from practicing medicine in the UK and is not licensed in the US either. His discredited research has had a significant negative impact on public health by fueling vaccine hesitancy.