[Scientists who track the spread of false information on social media honed their skills during the US presidential election last year] are now shifting focus, from false claims that the election was ‘stolen’ to untruths about COVID-19 vaccines. ... Researchers are launching projects to track and tag vaccine misinformation and disinformation on social media, as well as collecting massive amounts of data to understand the ways in which misinformation, political rhetoric and public policies all interact to influence vaccine uptake across the US.