title: Defense mechanisms, infection, antibiotic therapy, and immunizations in the elderly.
mesh_terms: D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D000917:Antibody Formation; D001424:Bacterial Infections / Q000188:drug therapy* / Q000276:immunology; D006801:Humans; D007114:Immunization; D014376:Tuberculosis / Q000188:drug therapy
chemical_list: D000900:Anti-Bacterial Agents