2.2.1. Vaccine-specific questionnaire
A vaccine-specific questionnaire was designed by a panel of psychologists and clinicians to access the perceptions and attitudes of the Brazilian adult population about vaccination for COVID-19, and to identify which factors are associated with vaccine hesitancy and lack of confidence in vaccines. To do so, vaccine hesitancy was defined and construed according to the definitions set forth by the SAGE Working Group on Vaccine Hesitancy, which defines vaccine hesitancy as the delay in acceptance or refusal of vaccination despite availability of vaccination services. 4 To this end, vaccine acceptance was assessed by the responses to the question: ”If you have not yet received a dose of the COVID-19 vaccine, do you plan to get vaccinated?” with the answer options “yes”, “no” and “not sure”. Responses ”no” and ”not sure” were coded into one variable to indicate refusal of vaccination. Moreover, the full questionnaire consisted of three main sections, including questions on (1) contextual, (2) individual and group, and (3) vaccine/vaccination-specific influences on COVID-19 vaccination.