a condition where the immune response is deficient or subnormal.

The state of a patient whose immune system has been compromised by disease or by administration of chemicals. This condition makes the system deficient in the number and type of blood cells needed to defend against a foreign substance.

A deficiency of immune response or a disorder characterized by deficient immune response; classified as antibody (B cell), cellular (T cell), or combined deficiency or as a phagocytic dysfunction disorder.

deficit in either T-cell or B-cell immunity

a deficiency or weakness of the immune system's response that prevents it from working, doing its job well

Decreased or compromised immune response to antigens with the appropriate cellular immunity reaction.

A deficiency of the immune response caused by hypoactivity or decreased numbers of lymphoid cells.

A deficiency in the immuneresponse leading to repeated infections; it may affect B cells, T cells, phagocytic cells, antibodyor complement.

In medicine, immunodeficiency (or immune deficiency) is a state in which the immune system's ability to fight infectious disease is compromised or entirely absent. Most cases of immunodeficiency are either congenital or acquired. A person who has an immunodeficiency is said to be immunocompromised.