How is immunotherapy the most effective form of allergy relief?

Immunotherapy is not the most effective form of allergy relief. While it can be an effective treatment for certain types of allergies, such as hay fever and dust mite allergies, it is not a cure and may not be suitable for everyone. Other forms of allergy relief, such as antihistamines, nasal sprays, and avoidance measures, may be more appropriate depending on the individual and the severity of their allergies.