Pathologies affecting the immune system are extremely complex, both in diagnosis and treatment, and therefore require highly qualified personnel. Their diagnosis requires cutting-edge technology in order to establish or rule out such pathologies. Immune-based diseases comprise a very broad group of disorders that include pathologies where immune mechanisms do not work adequately, either for genetic or acquired reasons (immunodeficiencies, AIDS), or due to other causes intrinsic to the system, such as neoplastic transformation of immune system cells, abnormal action of specific antibodies and/or sensitised lymphocytes or other associated effector systems, resulting in tissue damage in the host (hypersensitivity, infections and autoimmunity). Immunology also deals with situations in which lesions may result from the immune system defending itself against microorganisms (infection and immunity) or rejecting allografts (transplants and transfusions). Finally, Immunology covers the use of immunotherapy or immune-based treatments, transplantation, and cell and gene therapy protocols.

The Immunology Department's different areas work in close collaboration with Fundación Jiménez Díaz's clinical services and other public hospitals in the group involved in managing patients with immune system disorders. They are therefore part of multiple multidisciplinary groups, allowing a global approach to patients with a complex pathology.

The Immunology Department also functions as a referral centre for the diagnosis and immunological follow-up of patients studied in the numerous Quirónsalud group centres around Spain.