title: Concurrently circulating hepatitis B surface antigen and heterotypic anti-HBs antibody.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis*; D000937:Antigen-Antibody Reactions; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D013997:Time Factors
chemical_list: D000914:Antibodies, Viral; D006514:Hepatitis B Surface Antigens