According to [1] anti-vaxxers "have flocked to Substack, podcasting platforms and a growing number of right-wing social media networks over the past year after getting kicked off or restricted on Facebook, Twitter and YouTube."

If you're interested in censored material more broadly, you might be interested in the ALA's most challenged books lists [2] which include such classics as "Of Mice and Men" and "Adventures of Huckleberry Finn" along with books as widely loved as "Harry Potter" and "James and the Giant Peach"

[1] https://www.washingtonpost.com/technology/2022/01/27/substac... [2] https://www.ala.org/advocacy/bbooks/frequentlychallengedbook... https://www.ala.org/advocacy/bbooks/frequentlychallengedbook...