August 24, 2018 global disclosure
https://www.bbc.com/news/world-us-canada-45294192
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Johns Hopkins University. “Vaccination was being used by trolls and sophisticated bots as a “wedge issue”, said Mark Dredze from Johns Hopkins University.”
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George Washington University: “A significant portion of the online discourse about vaccines may be generated by malicious actors with a range of hidden agendas,” said David Broniatowski from George Washington University.
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Going back to year 2014: “Troll accounts that had attempted to influence the US election had also been tweeting about vaccines, a study says. Many posted both pro- and anti-vaccination messages to create “false equivalency”, the study found. It examined thousands of tweets sent between 2014 and 2017.”
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Source is Russia / Kremlin: “The researchers reviewed more than 250 tweets about vaccination from accounts linked to the St Petersburg-based Internet Research Agency (IRA)”
Back in August 2018, this was covered in every major news network across the world