[Immunological aspect of postoperative infections].
D000367:Age Factors; D000368:Aged; D000917:Antibody Formation; D003165:Complement System Proteins; D006801:Humans; D007111:Immunity, Cellular; D008875:Middle Aged; D011183:Postoperative Complications / Q000276:immunology*; D013530:Surgical Wound Infection / Q000276:immunology*
D003165:Complement System Proteins