Flexi Says: Sometimes people with an allergy get allergy shots. They are injected with tiny amounts of the allergen that triggers the allergic reaction. The shots are repeated at regular intervals, and the amount of allergen that is injected each time gradually increases. As an allergy is a disease in which the immune system makes an inflammatory response to a harmless antigen. Giving increasing doses of the allergen to a person allows the person to get used to the antigens, resulting in less severe inflammatory responses. They don’t cure allergies, but eventually the symptoms will get better and the person may not have allergic reactions as often.