title: [The immune system often serves as a straw to clutch at--but primary immune defects are rare].
authors.forename: H S
authors.initials: HS
authors.lastname: Füessl
mesh_terms: D000328:Adult; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D003937:Diagnosis, Differential; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000175:diagnosis* / Q000453:epidemiology / Q000235:genetics / Q000276:immunology; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D009894:Opportunistic Infections / Q000175:diagnosis* / Q000453:epidemiology / Q000276:immunology; D013001:Somatoform Disorders / Q000175:diagnosis