Anaphylaxis in Schools and Other Settings
Anaphylaxis (pronounced anna-fill-axis) is a serious allergic reaction that is rapid in onset and may cause death. An allergen is a substance capable of causing an allergic reaction. Upon first exposure in individuals who are predisposed to allergy, the immune system treats the allergen as something to be rejected rather than tolerated. This process is called sensitization. Re-exposure to the same allergen in the now-sensitized individual may result in an allergic reaction which, in its most severe form, is called anaphylaxis.