Allergies are among the most common chronic conditions in the world. Symptoms can range from mildly annoying to life-threatening.
Allergic reactions begin in the immune system, which protects us from invading organisms that can cause illness. In the case of patients with allergies, however, the immune system mistakes a harmless substance as a threat. This leads to a release of chemicals that cause an allergic reaction. For further allergy information, visit the website of the American Academy of Allergy Asthma & Immunology at http://www.aaaai.org/conditions-and-treatments/allergies.aspx