A prominent doctor who has often challenged government and media narratives about the COVID-19 vaccines has been permanently banned from Twitter.

Dr. Robert Malone played a key role in the invention of the mRNA vaccine, the type of vaccine that is being administered to many Americans in an effort to stave off COVID-19. Malone has often been critical of the use of the vaccines, as well those in the media and government who support them.

He shared a great deal of research on his Twitter account, which had more than half a million followers.

“We all knew it would happen eventually,” Malone said on his Substack. “Today it did. Over a half million followers gone in a blink of an eye. That means I must have been on the mark, so to speak. Over the target. It also means we lost a critical component in our fight to stop these vaccines being mandated for children and to stop the corruption in our governments, as well as the medical-industrial complex and pharmaceutical industries.”

In a conversation with The Tennessee Star Wednesday morning, before he was banned from Twitter, Malone said that he will film an episode of the “Joe Rogan Experience” with host Joe Rogan Thursday. The release date for that episode is unclear.

Rogan has the world’s most popular podcast, which streams on Spotify.

He is no stranger to controversy.

He recently hosted Dr. Peter McCullough, another doctor who has been critical of the way government entities have handled the pandemic. He has also hosted Dr. Sanjay Gupta, one of CNN’s medical commentators, in order to hear his opinions on the pandemic.

Twitter has often banned personalities that it has deemed to be “dangerous” or people who challenge prevailing narratives.

Alex Berenson is a former New York Times reporter.

He became intensely interested in the pandemic response and data about vaccine effectiveness, which he often discussed on his Twitter account and in news interviews until he was banned from the platform months ago.

He has now filed a lawsuit against Twitter over the ban, arguing that the tweet for which he was banned was undeniably true.

Twitter did not return a comment request about Malone’s ban.

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Pete D’Abrosca is a contributor at The Tennessee Star and The Star News Network. Follow Pete on Twitter. Email tips to [email protected].