From Kathleen MacNaughton, R.N.,
Your Guide to Asthma.
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About.com Health's Disease and Condition content is reviewed by Sanja Jelic, MD

Definition: Immunotherapy is a series of allergy shots given to gradually get your body "used to" an allergen or asthma trigger, so that you can build up a tolerance to it. In a more general sense, immunotherapy is any medication or treatment that alters the immune system, such as vaccines.

Get more detail on immunotherapy / allergy shots

Source: Asthma & Allergy Foundation of America