title: An antigen detected in the blood during the incubation period of serum hepatitis.
mesh_terms: D000941:Antigens / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006509:Hepatitis B / Q000175:diagnosis; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D005779:Immunodiffusion; D008297:Male
chemical_list: D000941:Antigens