This Pocket Guide was developed by an ARIA and EAACI joint study group from a background paper of the ARIA-MASK guidelines on allergen immunotherapy. Bousquet J, Pfaar O, Togias A, et al. (2019). Care pathways for Allergy 2019; 74: 2087–2102. Agache, Lau S, Akdis CA, immunotherapy: house dust mite-driven allergic asthma. Allergy, 2019;74:855-73. AIT is proven therapeutic option treatment rhinit...