title: The core of the matter.
mesh_terms: D000914:Antibodies, Viral / Q000276:immunology*; D002648:Child; D005260:Female; D006509:Hepatitis B / Q000276:immunology*; D006510:Hepatitis B Antibodies / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000276:immunology*; D006512:Hepatitis B Core Antigens / Q000276:immunology; D006801:Humans; D007223:Infant; D011247:Pregnancy
chemical_list: D000914:Antibodies, Viral; D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens; D006512:Hepatitis B Core Antigens