Q.Which antibody characterizes the allergic reaction?

Hypersensitivity is an exaggerated, overactive immune response to substances (allergens) that are normally harmless — the resulting condition is called allergy. Common allergens include dust mites, pollen and insect-venom proteins; symptoms (sneezing, watery eyes, runny nose, difficulty breathing) typically appear within seconds of exposure and last around half an hour. Allergy is mediated chiefly by IgE antibodies bound to mast cells, whose degranulation releases histamine and serotonin and drives the visible symptoms; hay fever and asthma are common ex …