Immunizations for the elderly.
D000368:Aged; D004165:Diphtheria / Q000517:prevention & control; D006801:Humans; D007114:Immunization; D007251:Influenza, Human / Q000517:prevention & control; D011008:Pneumococcal Infections / Q000517:prevention & control; D013742:Tetanus / Q000517:prevention & control