IFNG and Increased total eosinophil count: Of note, during RSV infection of HDM-induced asthmatic (HDM + RSV) mice, we detected a comparable IFN-γ-mediated inhibition of eosinophilia, as evidenced by ~5-fold increases of airway eosinophils in Ifng−/− mice as compared with HDM+RSV-treated WT controls (Figure 5B).