title: Immunological status of patients with recurrent chest infections.
mesh_terms: D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000276:immunology; D001991:Bronchitis / Q000276:immunology; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D007070:Immunoglobulin A / Q000032:analysis; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012141:Respiratory Tract Infections / Q000097:blood / Q000276:immunology*
chemical_list: D007070:Immunoglobulin A