title: Changing patterns of groups at high risk for hepatitis B in the United States.
mesh_terms: D006509:Hepatitis B / Q000175:diagnosis / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission*; D017325:Hepatitis B Vaccines; D006716:Homosexuality; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D011159:Population Surveillance; D012307:Risk Factors; D012747:Sexual Partners; D014481:United States; D014761:Viral Hepatitis Vaccines / Q000008:administration & dosage
chemical_list: D017325:Hepatitis B Vaccines; D014761:Viral Hepatitis Vaccines