title: SMALLPOX VACCINATION AND SERUM ANTI-A LEVELS.
mesh_terms: D000017:ABO Blood-Group System; D000906:Antibodies; D000941:Antigens; D006461:Hemolysis; D006801:Humans; D012899:Smallpox; D012900:Smallpox Vaccine; D014611:Vaccination
chemical_list: D000017:ABO Blood-Group System; D000906:Antibodies; D000941:Antigens; D012900:Smallpox Vaccine
keywords: ABO FACTORS; ANTIGENS; HEMOLYSIS; SMALLPOX VACCINE; VACCINATION