title: An outbreak of delta agent among a group of drug addicts and their close contacts.
mesh_terms: D000293:Adolescent; D000328:Adult; D003075:Coitus; D004196:Disease Outbreaks / Q000453:epidemiology*; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology / Q000635:transmission*; D006512:Hepatitis B Core Antigens / Q000032:analysis; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006513:Hepatitis B e Antigens / Q000032:analysis; D006716:Homosexuality; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D007558:Italy; D008297:Male; D019966:Substance-Related Disorders
chemical_list: D006512:Hepatitis B Core Antigens; D006514:Hepatitis B Surface Antigens; D006513:Hepatitis B e Antigens; D007075:Immunoglobulin M