| Type | Description | Tip to remember | Examples |
| I | Immediate-type Ig E mediated | Common allergic reactions | Anaphylaxis Angioedema Bronchospasm Latex allergy Allergic rhinitis Urticaria ABPA |
| II | Ab-dependent cytotoxicity | We see them in Hospital mostly | ABO hemolytic rxn Hyperacute Graft rejection Rh incompatibility Hemolytic anemia Thrombocytopenia Neutropenia |
| III | Immune complex disease | We see them in Specialist offices | PAN, SLE, RA, Hypersensitive pneumonitis Serum Sickness Arthus reaction Hep B |
| IV | Cell-mediated or delayed hypersensitivity | We see at PCP office mostly | Contact dermatitis-Latex, PPD, Poison ivy, Ni Ac and Chr Graft rejection Drug-induced hepatitis SJS/TEN DRESS |
The tips to remember are not absolute in terms of where these are seen normally but mostly helps us to kind of remember in a better way. At least it helped me.
