allergy-asthma-symptoms-vip-information
'All diseases are manifestations of abnormalities of molecules, chemical reactions, or processes.' (Murray RK, Harper's Biochemistry, 2000. p. 3)
Allergies are an overreaction of the immune system. People who have allergies have a hyper-alert immune system that overreacts to a substance in the environment called an allergen. Exposure to what is normally a harmless substance, such as pollen, causes the immune system to react as if the substance is harmful. "