title: FDA approves hepatitis B vaccine.
mesh_terms: D017277:Drug Approval; D006509:Hepatitis B / Q000188:drug therapy*; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000627:therapeutic use*; D011994:Recombinant Proteins; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D000077190:Interferon alpha-2; D016898:Interferon-alpha; D011994:Recombinant Proteins