title: Hepatitis B vaccine trials see clear leader in Merck.
mesh_terms: D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D004345:Drug Industry; D005602:France; D006509:Hepatitis B / Q000517:prevention & control*; D006801:Humans; D009316:National Institutes of Health (U.S.); D014481:United States; D014765:Viral Vaccines / Q000627:therapeutic use*
chemical_list: D014765:Viral Vaccines