title: Seroimmunity of National servicemen in Singapore to poliomyelitis.
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D007114:Immunization; D008297:Male; D008887:Military Medicine; D011051:Poliomyelitis / Q000276:immunology*; D012698:Serologic Tests; D012846:Singapore