Prefaced with a brief history of allergy and immunology, the main body of this work comprises over 1000 entries covering every aspect of: allergies and their symptoms; inherited allergies; occupational and environmentally induced allergies; treatment and therapies; distribution and statistics; and much more. This A-Z guide is designed to be authoratitive enough for professionals, yet accessible enough for the general reader. It contains many cross-referenced entries on allergens such as pollens, cats and dogs, dust, cosmetics, shampoos, foodstuffs, flavourings and insect bites.