Abstract The human respiratory system is a complex system involving the coordination of organs with different structural, functional and defensive mechanisms. The high costs and the high fatality rates associated with chronic respiratory disorders require some serious rethinking in our approach to...

An allergy is an abnormal reaction to an ordinarily harmless substance or substances. These sensitizing substances, called allergens, may be inhaled, swallowed or come into contact with the skin. When an allergen is absorbed into the body, it triggers white blood cells to produce IgE antibodies. The...