Ezra Levant, a Canadian media personality who founded Rebel News, had his book "China Virus" banned for distribution by Amazon. It was eventually unbanned, became a Canadian bestseller and then was rebanned again. Finally, it was allowed once more to be distributed by Amazon where it remains today. Amazon indicated to Levant that his book contradicted official sources but did not indicate what, or who, those sources were.
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Ezra Levant
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