INTRODUCTION
allergic rhinitis, allergic asthma
ALLERGIC RHINITIS, ALLERGIC ASTHMA
Allergen immunotherapy (AIT) is an effective treatment for allergic rhinitis (AR) and allergic asthma (AA), which involves the repeated administration of an allergen extract. An important question is whether AIT provides a sustained clinical effect after treatment cessation. Clinical studies suggest that a minimum of 3 years of AIT treatment results in sustainable clinical benefit and immunological changes with allergen‐specific tolerance.