title: Investigations on the incidence of Australia antigen among contacts in viral hepatitis foci in communities.
mesh_terms: D000293:Adolescent; D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D006506:Hepatitis A / Q000382:microbiology; D006509:Hepatitis B / Q000453:epidemiology* / Q000382:microbiology; D006511:Hepatitis B Antigens / Q000302:isolation & purification; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D012383:Romania; D012572:School Health Services; D013997:Time Factors
chemical_list: D006511:Hepatitis B Antigens