title: WHO position paper on hepatitis A vaccines.
mesh_terms: D006506:Hepatitis A / Q000453:epidemiology / Q000517:prevention & control* / Q000821:virology; D022362:Hepatitis A Vaccines; D006801:Humans; D017589:Immunization Programs; D017410:Practice Guidelines as Topic; D015995:Prevalence; D014761:Viral Hepatitis Vaccines / Q000627:therapeutic use*; D014944:World Health Organization
chemical_list: D022362:Hepatitis A Vaccines; D014761:Viral Hepatitis Vaccines