 The study examines predictors of belief in COVID-19 misinformation across five national samples from the UK, Ireland, USA, Spain and Mexico, finding that while public belief in misinformation is not common, a substantial proportion views it as highly reliable. Increased susceptibility to misinformation negatively affects compliance with public health guidance and willingness to get vaccinated against the virus. While higher trust in scientists and numeracy skills are associated with lower susceptibility to coronavirus-related misinformation. The results suggest that interventions aimed at improving critical thinking and trust in science may be a promising avenue for future research. This article was authored by John Rosenbeek, Claudia O'Shneider, Sarah Dryhurst and others.