Evidence-to-policy gap on hepatitis A vaccine adoption in 6 countries: Literature vs. policymakers’ beliefs

Highlights • Applied two research methods to examine gaps between evidence and policy. • Reviewed 340 articles and conducted 62 interviews across 6 countries on hepatitis A. • Economic data on hepatitis A is weak despite stakeholders’ agreement on importance. • Political will and prioritization are adoption barriers often absent in literature. • Hepatitis A vaccine may benefit countries moving through economic transition.