Humoral immune deficiency and recurrent otitis media.
D000917:Antibody Formation; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000453:epidemiology / Q000276:immunology*; D007223:Infant; D010033:Otitis Media / Q000453:epidemiology / Q000276:immunology*; D012008:Recurrence; D013029:Space-Time Clustering