∞ generated and posted on 2016.03.20 ∞

Immune system actions that give rise to disease.

Hypersensitivities, also known as hypersensitivity reactions, usually a differentiated into four types. These type I, type II, type III, and type IV hypersensitivities. Both allergies and autoimmune diseases are general categories of hypersensitivity reactions, ones that fall into various of the above categories.