Hepatitis E Vaccination Preferences and Willingness-to-Pay Among Residents: A Discrete Choice Experiment Analysis.

Subgroup Preference Heterogeneity Both population groups exhibited a highly significant preference for longer protection durations (10 years/30 years vs. 5 years; p < 0.001), indicating that extended protection duration is a core attribute for improving vaccination willingness ( Figure 2 and Figure 3 ).

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