Allergy shots: could they help your allergies?

摘要

An allergy shot contains a very small amount of what you are allergic to (called an allergen). Common allergens include mold and pollen from grasses, ragweed, and trees. For example, if you are allergic to grass pollen, a small amount of the pollen is put into the shot. Allergy shots help your body fight the allergen. When you get shots that contain the allergen, your immune system makes antibodies to the allergen. The next time you have contact with the allergen, these antibodies help blockits effect. Because the antibodies block the way your body reacts to the allergen, your allergy symptoms become less severe. After many shots, you may start to get relief from your allergy symptoms. This relief will last for a long time.