title: New vaccine approved for 2 hepatitis viruses.
mesh_terms: D017277:Drug Approval; D006506:Hepatitis A / Q000517:prevention & control*; D022362:Hepatitis A Vaccines; D006509:Hepatitis B / Q000517:prevention & control*; D017325:Hepatitis B Vaccines; D006801:Humans; D014481:United States; D014486:United States Food and Drug Administration; D017778:Vaccines, Combined / Q000627:therapeutic use*
chemical_list: D022362:Hepatitis A Vaccines; D017325:Hepatitis B Vaccines; D017778:Vaccines, Combined; C433226:twinrix