● The biggest expressed concern of the unvaccinated is the safety of the COVID-19 vaccines. 

● The unvaccinated are much more likely to be skeptical of the efficacy and safety of vaccines more generally. 

● A relatively modest share of the unvaccinated have logistical and cost concerns; but among the unvaccinated but vaccine willing, logistical and cost concerns loom substantially greater. 

● Underlying many of the concerns regarding the COVID-19 vaccines is a lack of trust in the institutions that oversee and vouch for their safety. 

● Trust in relevant institutions is strongly associated with vaccination rates at the individual and state levels.