IFNA2 and infection: Thus, we performed high MOI infections of Vero cells and analyzed virus yields at 1 dpi (at a MOI of 10 for untreated cells, a MOI of 20 for cells pretreated with IFN-α, and a MOI of 100 for cells pretreated with both IFN-α and IFN-γ) (Fig. 1C).