IL9 and asthma: Likewise, total leukocyte counts (Fig. 3C), leukocyte composition (Fig. 3D), and levels of canonical T2 (IL-4, IL-5, and IL-13) (Fig. 3, E to G) or other asthma-related cytokines (IL-1β, tumor necrosis factor–α, IL-9, IL-10, IL-17A, and eotaxin) (fig.