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Psychological and experiential drivers of vaccine confidence after compliance

par Vermeulen, Nicolas;Servais, Olivier;Jidovsteff, Boris;Paul, Elisabeth
Référence Vaccine: X, page (100880)
Publication Publié, 2026-08

Article révisé par les pairs

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Résumé :

BackgroundDeterminants of COVID-19 vaccine confidence have been widely studied among unvaccinated individuals, but less is known about factors shaping confidence among those already vaccinated.MethodsWe conducted an online survey (December 2021) among 3171 fully vaccinated French-speaking adults in Belgium. Vaccine confidence (1–9 scale) was analyzed using stepwise regression including health variables, fear of COVID-19, and personality traits.ResultsHigher confidence was associated with comorbidities, fear of COVID-19, conventionalism, and authoritarian submission. Lower confidence was associated with self-reported adverse events and conspiracy beliefs. Psychological and experiential factors showed stronger associations than health characteristics alone.ConclusionsVaccine confidence remains heterogeneous among vaccinated individuals and is shaped by both psychological traits and post-vaccination experiences. These findings suggest that vaccine confidence is not a static attitude but a dynamic construct that remains associated with individual beliefs, emotional responses, and post-vaccination experiences. Addressing safety concerns and fostering trust may be essential to sustain engagement in ongoing vaccination programs.