Exploring the feelings of being at risk of vaccine related adverse effects: A cross-sectional survey in France.

Objectives: The literature on vaccine hesitancy has widely commented on the various factors leading some to feel particularly at risk of disease infection while others do not. But little attention has been paid to whether we also see such differences regarding people's assessment of their personal vulnerability towards vaccine adverse events (AEs).
Methods: We designed two cross-sectional online surveys among representative samples of the French mainland population (n = 2015 and 3087). We asked participants if they felt, more than others, at risk of severe vaccine related side effects and to explain why. We performed two separate mixed effect binomial regressions models: 1) to explore the link between the feeling of being particularly at risk of severe vaccine related AEs and socio-demographic characteristics, source of information, trust in health agencies and partisan orientation; 2) to explore the link between the fear of side effects and vaccine hesitancy.
Results: We found that 15% of respondents felt to be, more than others, at risk of severe vaccine-related adverse events and that this feeling was associated to negative attitudes to vaccines. This feeling was particularly prevalent among women, those with a lower income, lower educational attainment and lower trust in public health institutions. The vast majority of the reasons given by responders are unrelated to genuine risk factors of vaccine related adverse events.
Conclusions: These findings suggest that vaccine hesitancy is at least partly grounded in a feeling of vulnerability towards vaccine adverse events.
Competing Interests: Declaration of Competing Interest All authors have completed the Unified Competing Interest form and declare that J.K.W. is a member of the Commission Technique des Vaccinations at the Haute Autorité de la Santé.”
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