We neutralized IFN-γ in one group of influenza-infected mice using anti-IFN-γ mAb injections two days prior to and at the day of influenza infection, and every two days until day 10 p.i. As a control, a group of uninfected NKCKD mice were treated with anti-IFN-γ mAb as well. This evidence concerns the gene IFNG and influenza.