From emergence to trace: vaccine hesitancy as informal mobilization on Brazilian Facebook and its impacts on sanitary democracy (2014-2022)
DOI:
https://doi.org/10.21142/DES-1804-2026-0085Keywords:
Vaccination, social movement, disinformation, political polarizationAbstract
This article analyzes HPV vaccine hesitancy on Brazilian Facebook. The vaccine, free and scientifically robust, faced growing resistance from 2014 onward, with coverage persistently below target. The objective is to demonstrate that this hesitancy is not an individual information deficit but a form of platform-mediated informal mobilization. Methodologically, the study combines qualitative content analysis and descriptive analysis of engagement metrics across 1,064 publications collected via the Meta Content Library API at three milestones: 2014, 2017, and 2022. Results reveal three phases: initial panic amplified by the mainstream press (2014); politicization linked to the Bolsonarist ecosystem (2017); and demobilization on the platform (2022). It concludes that, although the debate has subsided on Facebook, its effects on low vaccination coverage persist as lasting traces for sanitary democracy.
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