title: The status of bacterial vaccines and antigens--a review of the problem.
mesh_terms: D000942:Antigens, Bacterial / Q000592:standards*; D001428:Bacterial Vaccines / Q000592:standards*; D004341:Drug Evaluation; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D000942:Antigens, Bacterial; D001428:Bacterial Vaccines