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T-helper type 2 (TH2) immune processes in asthma. TH2 cells produce cytokines interleukin (IL)-4, IL-5, and IL-13 that stimulate allergic and eosinophilic inflammation and cause changes in the airway epithelium and smooth muscle that contribute to the pathobiology of asthma. Reprinted by permission from Macmillan Publishers Ltd. Copyright 2012.10 Copyright Nature Publishing Group, New Yok. All permission requests for this image should be made to the copyright holder.
