title: On call.  I'm 68, and I had the pneumonia vaccine a few years ago.  Now I hear that I need to have two different ones.  Do I really need to do this?
authors.forename: William
authors.initials: W
authors.lastname: Kormos
mesh_terms: D000368:Aged; D006304:Health Status; D006801:Humans; D007115:Immunization Schedule; D008297:Male; D010353:Patient Education as Topic; D022242:Pneumococcal Vaccines / Q000627:therapeutic use*; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D018074:Vaccines, Conjugate / Q000627:therapeutic use
chemical_list: C538862:13-valent pneumococcal vaccine; D022242:Pneumococcal Vaccines; D018074:Vaccines, Conjugate