Antibody deficiency disorders.
D000361:Agammaglobulinemia / Q000175:diagnosis*; D002675:Child, Preschool; D004406:Dysgammaglobulinemia / Q000175:diagnosis; D006801:Humans; D017098:IgA Deficiency; D005779:Immunodiffusion; D007223:Infant; D008297:Male; D009391:Nephelometry and Turbidimetry