Synonym for immune deficiency diseases ... Those diseases in which immune reactions are suppressed or reduced. Reasons may include congenital absence of B and/or T lymphocytes or viral killing of helper lymphocytes (see HIV). ... (18 Nov 1997) ... 
See immune deficiency diseases.
Type: Term Pronunciation: im′yū-nō-dē-fish′ĕnt Definitions: 1. Lacking in some essential function of the immune system.
Immunodeficient: Lacking immunity and so susceptible to infection.
Unable to mount an immune response to a disease.
adjective incapable of developing an immune response following exposure to an antigen; `immunodeficient rodents`
Lacking one or more elements of a working immune system. Immune deficiency is the term generally used for patients who are born with such a defect, while those who acquire such a deficiency later in life are referred to as immunocompromised or immunosuppressed. A serious impairment of the immune system is sometimes known as SCID, or severe combined...