Enlarge / BOSTON—A man wearing a QAnon vest held a flag during a No Mandatory Flu Shot Massachusetts rally held outside of the State House in Boston on Aug. 30, 2020, to demonstrate against Gov. Charlie Baker's order for mandatory influenza vaccinations for all students under the age of 30, an effort to lower the burden on the health care system during the COVID-19 pandemic. (credit: Boston Globe | Getty Images)

The online phenomenon known as QAnon is evolving beyond its pro-Trump roots and spreading rapidly into new global communities, despite efforts by social media platforms to stamp out the world’s most persistent conspiracy theory.

Cryptic posts by the group or individual known as “Q” first began appearing on the imageboard 4chan in 2017, propagating a theory that swiftly gained traction online in which the US president is leading a battle against a “deep state” that wields control over the country.

In July, TikTok blocked several hashtags, while Twitter banned thousands of accounts. Last month, Facebook launched a sweeping crackdown on the movement, including shutting 790 QAnon-related groups.