Neutrophilic inflammation, CXCL-1 levels and pulmonary inflammation were not significantly different when comparing WT OVA+Sp and IL-22 KO OVA+Sp groups (Figure 7B–G), suggesting that IL-22 is not involved in the comorbidity asthma and acute pneumonia that courses with neutrophilic inflammation. Here, CXCL1 is linked to pneumonia.