Question

Explain the following in not more than 70 words.

Hypersensitivity

Answer 1

Hypersensitivity:

1. Hypersensitivity is an exaggerated or excessive immune response to an antigen or allergen.
2. It occurs when the immune system reacts strongly to normally harmless substances like pollen, dust or certain foods.
3. Allergens stimulate the production of IgE antibodies.
4. These antibodies activate mast cells, causing the release of histamine and other chemicals.
5. Symptoms include sneezing, itching, skin rashes and breathing difficulties.