Allergy
What are the causes of allergies? An allergy is a hypersensitivity to a certain substance, which is called an "allergen". Some of them are harmless, while others can pose a serious problem. The allergen cannot be a virus or bacteria, but a food, an inhalant or a chemical, such as smoke, mold, pollen, perfume, hair spray, stove smoke, paint odors, tobacco smoke, etc. The most common type of allergy […]
