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Russian bots were used to sow divisions on vaccines

By Helen Branswell

In the lead-up to the 2016 U.S. election, Russian bots and trolls took to Twitter and other social media platforms to try to turn Americans against one another. But in addition to spreading false information and interfering in the election, a new study reports, a significant number of these malevolent actors tried to sow discord over vaccines.

An analysis of Twitter accounts previously identified as having been operated by Russian bots and trolls found they dove into the vaccine debate as early as January 2015, the researchers reported. They did not take one side or the other, but seemed to tweet pro-vaccine and anti-vaccine messages in roughly equal measure.

On a variety of issues, the overall aim of the Russian campaign appeared to be to erode social cohesion and generate confusion by amplifying the number of voices taking part in these debates on social media. But in the case of vaccines, that could have increased the misperception that the science on their safety and effectiveness isn’t settled — as is the case — but rather that it is still subject to debate.

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Even though the division of pro- and anti-vacccine tweets was roughly equal, that still skewed the picture of views on vaccines on Twitter, he noted, pointing to data from the Pew Trust that shows the vast majority of Americans support vaccination.

“We’ve always been a little puzzled why social media looks like there are so many anti-vaxxers,” said Broniatowski. “So even if somebody’s posting 50-50, compared to the Pew data, there are going to be more anti-vaxxers.”