title: The development of HBsAg-positive hepatitis despite the previous existence of antibody to HBsAg.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis*; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006525:Hepatitis, Viral, Human / Q000276:immunology*; D006801:Humans
chemical_list: D000914:Antibodies, Viral; D006514:Hepatitis B Surface Antigens