In March, Twitter put its foot down: users who repeatedly spread false information about COVID-19 vaccines will have their accounts suspended or shut down. It was a new front in a high-stakes battle over misinformation that could help to determine how many people get vaccinated, and how swiftly the pandemic ends.
The battle is also being fought in computer-science and sociology labs across the United States, where scientists who track the spread of false information on social media honed their skills during the US presidential election last year. They are now shifting focus, from false claims that the election was ‘stolen’ to untruths about COVID-19 vaccines. Some surveys suggest that more than one-fifth of people in the United States are opposed to receiving a vaccine.