> See also: > - Reference # Hypersensitivity **Type I** - IgE mediated - Immediate - Mast, basophil, and eosinophils **Type II** - Modified components - Initiated by IgG and IgM antibodies - Complement activation and phagocytosis - Resulting in cell lysis **Type III** - Immune complex reactions - Initiated b IgG or IgM immune complexes **Type IV** - Delayed reaction mediated by cellular response