Misinformation about the arrival of the dengue vaccine in Brazil.
The study analyzed 1,550 comments on Facebook posts by major media outlets, identifying five categories of content analysis: disinfodemic, vectors of misinformation, politicization of the vaccine, vaccine hesitancy/refusal, and personal experiences.
Nearly one-third of the comments analyzed contained some type of misinformation, with a large portion falling into the category of vaccine politicization. The findings underscore the urgency of effective communication strategies to combat misinformation and strengthen public confidence in dengue vaccination.