The topic of allergies has become routine in our lives, and certainly most people have an idea of what an allergy is.Basically an allergy is an over reaction of the body to a normally harmless substance and is a major public health problem in developed countries. It's believed that in many cases, allergy is genetically inherited.However, allergy is not a disease in the typical sense but more to hypersensitivity.
For many, allergy is manageable, but for others, it can cause a severe reaction that can result in death if not treated immediately. You may want to be clear about your own understanding of what an allergy is and who is at risk so that you can better explain it to your family and friends.