title: Intrafamilial spread of hepatitis Bs antigen.
mesh_terms: D000208:Acute Disease; D000328:Adult; D002648:Child; D005260:Female; D006509:Hepatitis B / Q000235:genetics* / Q000276:immunology / Q000635:transmission; D006514:Hepatitis B Surface Antigens; D006801:Humans; D008297:Male
chemical_list: D006514:Hepatitis B Surface Antigens