What do you mean by Allergy?

What is an Allergy? One of the many tasks of the immune system is to guard our body against contagious agents and exogenous toxins. For that, it must be able to differentiate between harmless and harmful exposure. Allergy is defined as an unwanted immune response towards exogenous elements that have breached the defensive boundaries of the body like skin, mucous membranes. The unusual immune response can lead to a mixture of chemical responses that are harmful to the affected individual. The [...]