Response of Unvaccinated US Adults to Official Information About the Pause in Use of the Johnson & Johnson-Janssen COVID-19 Vaccine: Cross-Sectional Survey Study.

Using a rapid response web-based survey, we identified gaps in public understanding of the Centers for Disease Control and Prevention's messaging about the pause in use of the Johnson & Johnson-Janssen COVID-19 vaccine and estimated changes in vaccine hesitancy using counterfactual questions.