Immune system is an organized intricate network of cells and organs that protects our body from invading foreign pathogens. This defence centre provides immunity which provides shelter from both disease and infection. Disfunctioning of such supportive centre leads to Immune deficiency, which in turn induce Immunodeficiency disorders. These disorders impair the immune system’s ability to defend the invading foreign cells. They are primarily caused by genetic mutations and are inherited. Secondarily immune deficiencies are acquired from a foreign pathogen like virus or by using immune suppression drugs.
There’s a situation where the immune system attacks the healthy cells within, which induce infection and disease termed as autoimmune disease. These in turn affects many parts of the body. These are more likely to occur in women of American countries.