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(C) Reuters. Facebook logo is reflected in a drop on a syringe needle in this illustration photo taken March 16, 2021. Picture taken March 16, 2021. REUTERS/Dado Ruvic/Illustration

By Nandita Bose

WASHINGTON (Reuters) – The attorneys general of 14 U.S. states sent a letter to Facebook Inc (NASDAQ:FB) Chief Executive Mark Zuckerberg asking if the top disseminators of vaccine disinformation on the platform received special treatment from the company.

The line of inquiry was generated after Facebook whistleblower Frances Haugen used internal documents to disclose that the social media platform has built a system that exempts high-profile users from some or all of its rules.

In the letter, which was sent on Wednesday, the 14 Democratic attorneys general said they are “extremely concerned” with recent reports that Facebook maintained lists of members who have received special treatment, and want to know if the “Disinformation Dozen” were part of those lists.

The Center for Countering Digital Hate describes the “Disinformation Dozen” as 12 anti-vaxxers who are responsible for almost two-thirds of anti-vaccine content circulating on social media platforms.

Facebook did not immediately respond to a request for comment. It has previously said the company has introduced rules against making specific false claims about COVID-19 and vaccines for it, and says it provides people reliable information on these topics.

COVID-19 disinformation has proliferated during the pandemic on social media sites including Facebook, Twitter Inc (NYSE:TWTR) and Alphabet (NASDAQ:GOOGL) Inc’s YouTube. Researchers and lawmakers have long accused Facebook of failing to police harmful content on its platforms.

In July, President Joe Biden said social media platforms like Facebook “are killing people” for allowing misinformation about coronavirus vaccines to be posted on its platform.

Haugen, a former product manager on Facebook’s civic misinformation team, left the nearly $1 trillion company with tens of thousands of confidential documents and has called for transparency about how Facebook entices users to keep scrolling, creating ample opportunity for advertisers to reach them.

The letter was sent by the attorneys general of Connecticut, California, Delaware, Illinois, Iowa, Maine, Massachusetts, Michigan, Minnesota, Maryland, Pennsylvania, Rhode Island, Vermont and Virginia.

Fourteen U.S. attorneys general press Facebook on vaccine disinformation

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Fourteen U.S. attorneys general press Facebook on vaccine disinformation