title: Immunological reactivity of senescent and old people actively immunized with tetanus toxoid.
mesh_terms: D000367:Age Factors; D000368:Aged; D000375:Aging; D000917:Antibody Formation; D001161:Arteriosclerosis / Q000276:immunology; D006801:Humans; D007114:Immunization; D008875:Middle Aged; D013743:Tetanus Antitoxin; D013745:Tetanus Toxoid
chemical_list: D013743:Tetanus Antitoxin; D013745:Tetanus Toxoid