Hypersensitivity (also called hypersensitivity reaction) refers to undesirable reactions produced by the normal immune system, including Allergies and autoimmunity. These reactions may be damaging, uncomfortable, or occasionally fatal. Hypersensitivity reactions require a pre-sensitized (immune) state of the host. The four-group classification was expounded by P. H. G. Gell and Robin Coombs in 1963. (Wikipedia)
Allergen
Type II hypersensitivity is also known as cytotoxicity hypersensitivity and it may affect variety of organs and tissues. The antigens are endogenous and exogenous chemicals. Type III Hypersensitivity complex type of hypersensitivity and it may affect individual organs like skin, Liver etc.
Hypersensitivity.
allergy
allergy
Hypersensitivity resulting from sensitization following prior contact with the agent
The medical term for a substance that produces hypersensitivity is an allergen. Allergens can trigger allergic reactions in individuals who are sensitive to them, leading to symptoms such as sneezing, itching, and hives.
It is also called DTH(delayed type hypersensitivity) is cell mediated instead of antibody
contact dermatitis
It is an allergy
This term means a hypersensitivity to an environmental factor. This comes from the Greek meaning "other work".
anaphylaxis