June 16th, 2014
Immunodeficiency is a deficit of the immune system. Sometimes referred to as immunosuppression, this condition results in an organism having a reduced or non-existent ability to fight infection or illness. When it is pronounced and sustained, the affected person becomes extremely susceptible to opportunistic infections (caused by normally harmless germs that only affect organisms with weakened defenses). There are two types of immunodeficiency: innate immunodeficiency (rare) and acquired immunodeficiency, the most well-known example of which is AIDS.
Source: Santé magazine.net