Question

difference between hypersensitivity reaction type 1 2 3 and 4

Answer 1

Type I: Immediate Hypersensitivity (Anaphylactic Reaction) These allergic reactions are systemic or localized, as in allergic dermatitis (e.g., hives, wheal and erythema reactions). ...

Type II: Cytotoxic Reaction (Antibody-dependent) ...

Type III: Immune Complex Reaction. ...

Type IV: Cell-Mediated (Delayed Hypersensitivity)