What are the limitations of the current definition of allergy?

An allergy is the response of the body's immune system to normally harmless substances, such as pollens, foods, and house dust mite. Clinical criteria were proposed that emphasized the need for heightened suspicion of anaphylaxis in patients with a previous history of allergic reactions to a ... Definition of ocular allergies · Seasonal allergic conjunctivitis is due to hypersensitivity against pollen. It is characterized by spring and early-summer ... A food allergy occurs when the body's immune system sees a certain food as harmful and reacts by triggering an allergic reaction. There are two categories of ... An allergen is any normally harmless substance that causes an immediate allergic reaction in a susceptible person. Food allergens are almost always proteins ... Hives usually start as an itchy patch of skin that turns into swollen red bumps—they can sometimes be mistaken for bug bites. They are also known as nettle rash ... Allergy occurs when a person's immune system reacts to substances in the environment that are harmless to most people. These substances are known as allergens ... AAAAI experts explain an allergic reaction occurs when the immune system overreacts to a harmless substance called an allergen. An allergen is an otherwise harmless substance that triggers an allergic reaction in sensitive individuals by stimulating an immune response. Dec 10, 2018 ... An allergy is the body's erroneous reaction to a foreign substance that is completely harmless for all intents and purposes.