Diseases and Disorders of the Immune System

Immunodeficiency is a state where the immune system's ability to fight infectious disease is impaired or absent.

Autoimmune diseases are an inappropriate immune response against tissues in the body.

Mononucleosis is an infectious disease caused by the Epstein-Barr virus (EBV) and results in flu-like symptoms.

Psoriasis is an autoimmune disease that affects the skin, caused by faulty immune signals that speed up the growth cycle of skin cells.