Aberrant levels of cytokines from IPF patients has been reported and the role of interleukins in the pathogenesis of pulmonary fibrosis has been reviewed recently (She et al., 2021), among the upregulated interleukins in serum or bronchoalveolar lavage fluid (BALF) include IL-1β, IL-2, IL-8, IL-10, IL-12, IL-17A, and IL-33. This evidence concerns the gene IL33 and pulmonary fibrosis.