<unk>  disorders are associated with or predispose patients to various complications, including infections, autoimmune disorders, and lymphomas and other cancers. Primary<unk> es are genetically determined and can be hereditary; secondary<unk> es are acquired and much more common.  combined immune defect<unk>  both types of acquired<unk> , i.e. both<unk>  and<unk>  responses. Acquired<unk>  remembers when it encounters an invading foreign cell or molecule antigen and quickly mounts a specific response on subsequent encounters.<unk>  acquired responses are mediated by T cells, also called T lymphocytes, which kill infected cells, help B cells, and control the immune response.<unk><unk>  is mediated by B cells which produce antibodies immunoglobulins that help T cells and other immune cells to recognize and attack antigens.
Immunodeficiency affecting cellular and humoral Immunity
Diseases of immune dysregulation
Lymphocytopenia causes
Systemic autoimmune diseases
Congenital defects of phagocytes
Myeloproliferative neoplasm causes
Overwhelming post-splenectomy infection
Allergy causes