title: [Immunosenescence and defense mechanism (author's transl)].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D006801:Humans; D007109:Immunity; D007958:Leukocyte Count; D008875:Middle Aged; D013601:T-Lymphocytes / Q000276:immunology*