Allergies are a very common overreaction of the immune system to a usually harmless substance. It is one of the most chronic diseases, and the toxins responsible for allergic reactions are called allergens. Because our immune systems produce substances known as antibodies, allergy symptoms occur when the immune system mistakes a whol ...
Allergies are a very common overreaction of the immune system to a usually harmless substance. It is one of the most chronic diseases, and the toxins responsible for allergic reactions are called allergens. Because our immune systems produce substances known as antibodies, allergy symptoms occur when the immune system mistakes a whol ...