having an impaired immune system and therefore incapable of an effective immune response, usually as a result of disease, such as AIDS, that damages the immune system
immunocompromised im·mu·no·com·pro·mised (ĭm'yə-nō-kŏm'prə-mīzd, ĭ-my&oomacr;'-) adj. Incapable of developing a normal immune response, usually as a result of disease, malnutrition, or immunosuppressive therapy.