https://www.theguardian.com/world/2021/jul/17/covid-misinformation-conspiracy-theories-ccdh-report

CCDH finds ‘disinformation dozen’ have combined following of 59 million people across multiple social media platforms

The vast majority of Covid-19 anti-vaccine misinformation and conspiracy theories originated from just 12 people, a report by the Center for Countering Digital Hate (CCDH) cited by the White House this week found.