The tonsils and adenoids.
D000233:Adenoidectomy; D000234:Adenoids / Q000276:immunology / Q000382:microbiology; D000328:Adult; D002051:Burkitt Lymphoma / Q000276:immunology; D002648:Child; D006566:Herpesviridae Infections / Q000276:immunology; D006801:Humans; D007111:Immunity, Cellular; D010033:Otitis Media / Q000276:immunology / Q000601:surgery; D014066:Palatine Tonsil / Q000276:immunology; D011183:Postoperative Complications / Q000382:microbiology; D013290:Streptococcal Infections / Q000382:microbiology; D013297:Streptococcus pyogenes; D014068:Tonsillectomy; D014069:Tonsillitis / Q000276:immunology / Q000382:microbiology / Q000601:surgery