title: Problems caused by immunodeficiencies.
mesh_terms: D000917:Antibody Formation; D000936:Antigen-Antibody Complex; D003165:Complement System Proteins / Q000276:immunology; D006801:Humans; D007111:Immunity, Cellular; D007136:Immunoglobulins / Q000276:immunology; D007153:Immunologic Deficiency Syndromes / Q000145:classification / Q000276:immunology*; D008214:Lymphocytes / Q000276:immunology
chemical_list: D000936:Antigen-Antibody Complex; D007136:Immunoglobulins; D003165:Complement System Proteins