IFNG and Methicillin-Resistant Staphylococcus Aureus Pneumonia: Through a comparison experiment with IFN-γ knockout and WT mice, Verma et al. showed that IFN-γ promoted the inflammatory cytokine storm response to cause lethal lung damages in a model of post-influenza methicillin-resistant Staphylococcus aureus pneumonia (35).