IRF1 and infection: Overexpression of IRF7 in KO IFNAR1 cells infected with DTMUV partially restored the expression of IFN-β at 12–48 hpi, IFIT5 at 36–48 hpi, IRF1 at 48 hpi (Figure 3), and MX1 at 12–48 hpi (Figure S9B), indicating a type I IFN-independent role of IRF7 in the induction of these genes during DTMUV infection.