Clinical Allergy

Clinical Allergy is a branch which deals with clinical disorders at the molecular and cellular levels. Allergy involves an exaggerated response of the immune system, often to common substances such as foods or pollen. The immune system is a complex system that normally defends the body against foreign invaders, such as bacteria and viruses, while also surveying for conditions such as cancer and autoimmunity. Allergens are substances that are foreign to the body and that cause an allergic reaction .