[Elements of misinformation in the public perception of the dengue vaccine in Brazil: an analysis of comments on social media].

In 2024, dengue in Brazil reached alarming epidemiological rates, being considered potentially the worst year in history. In this context, the arrival of vaccines against the disease represents a great advance for Brazil's public health. However, misinformation and fake news about vaccines pose a threat to the success of immunization campaigns. In this article, we aim to understand the elements of misinformation present in the public perception about the arrival of dengue vaccines in Brazil. To this end, 1,550 comments were collected on online posts from five major media outlets in the country, resulting in five thematic categories created from a categorical content analysis: disinfodemic, misinformation vectors, vaccine politicization, vaccine hesitancy/vaccine refusal, and personal experiences. It is concluded that almost 1/3 of the comments collected have some misleading content, which reinforces the need to create different strategies to confront and combat misinformation. The scenario of vaccine hesitancy and politicization of public health-related issues that exist as a consequence of COVID-19 is of great relevance for discussions in the public sphere and a challenge to be faced in the coming years.