Hypersensitivity relating to an immunological process is an exaggerated, even dangerous, reaction to an intrusion, no matter how small, in the body
, that would not have provoked a reaction in those that are not hypersensitive. This immune response can be generated by a toxin, virus, bacteria, or allergen. Certain reactions are called allergies
, which can be severe enough to be fatal, such as cases of anaphylactic shock
. Hypersensitivity initially presents a sensitizing phase, followed by a latency phase. During the lesion
phase, in other words on second contact with the allergen, the symptoms appear.
Original article published by
. Translated by Jeff
Latest update on November 19, 2013 at 11:03 AM by Jeff.