 Misinformation about COVID-19 is a serious threat to public health. Our study found that people who believe in false or exaggerated claims about the virus are more likely to be non-compliant with public health guidelines and less likely to get vaccinated themselves or recommend it to others. Additionally, those who have greater trust in scientists and high enumeracy skills are less likely to believe in misinformation. These findings highlight the importance of educating the public on accurate information about the virus and encouraging them to trust scientific evidence. This article was authored by John Rosenbeek, Claudia O'Shneider, Sarah Dryhurst, and others.