 The study aimed to investigate the acceptability of messages to be delivered by a chatbot named Vera from Johns Hopkins University, specifically focusing on which message styles were preferred by young, urban-dwelling Americans and public health workers. The results showed that participants preferred messages that began with an empathetic reflection of a user concern and concluded with a straightforward, fact-supported response. Most participants disapproved of moralistic or reasoning-based appeals to get vaccinated, although public health workers felt that such strong statements appealing to communal responsibility were warranted. Responses tested with humor and testimonials did not appeal to the participants. This article was authored by Rose Weekes, Lyra Cooper, Pooja Sangha, and others.