Answer
1. Immediate hypersensitivity, for example: allergy
2. Antibody mediated, for example: blood group incompatibility
3. T-cell mediated, for example: dermatitis
4. Immune-complex mediated, for example: serum sickness
Work Step by Step
Four major categories are:
1. Immediate hypersensitivity, for example: allergy
2. Antibody mediated, for example: blood group incompatibility
3. T-cell mediated, for example: dermatitis
4. Immune-complex mediated, for example: serum sickness