IFNG and coinfection: Between two lentivirus co-infections, Ad5 viral load from LV-CMV-IFNγ co-infected cell cultures was significantly lower than that from LV-CMV-GFP co-infected cells (P = 0.032) (Figure 5A), suggesting that interferon-γ rather than GFP could additionally enhance the inhibition of Ad5 replication in the co-infected cells.