Why is the peanut allergy an immediate hypersensitivity?
The traditional classification for hypersensitivity reactions is that of Gell and Coombs and reactions like the peanut allergy are classified as: Type 1 (immediate hypersensitivity reactions) because they involve immunoglobulin E (IgE)–mediated release of histamine and other mediators from mast cells and basophils. ChaCha!