title: Hepatitis B: an urban epidemic.
mesh_terms: D006509:Hepatitis B / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission; D006801:Humans; D014481:United States; D014505:Urban Population; D014761:Viral Hepatitis Vaccines / Q000627:therapeutic use
chemical_list: D014761:Viral Hepatitis Vaccines