Purpose of review: Allergen-specific immunotherapy (AIT) has been used in clinical practice to treat allergic diseases for over 100 years. The effectiveness and safety of AIT have been substantiated in numerous studies; however, children before 5 years of age and elderly are not encompassed generally. This review aims to present the current understanding of AIT in the extremes of age.
Recent findings: Early allergen immunotherapy during infancy or early childhood may prevent the development of allergic sensitization to common allergens, thereby reducing the risk of developing allergic diseases later in life. In the elderly, improved symptoms and quality of life and reduced dependence on medication are indicated the importance on the implementation of AIT. Both clinical and immunological parameters demonstrated that the treatment was effective at the time of cessation and trend to sustained tolerance.
Summary: There is no specific lower or upper age limit for initiating immunotherapy; however, it is important to thoroughly evaluate the severity of disease and the risks and benefits in each case.
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