IFNA1 and infection: HeLa, HeLa-T56-KO#1, and -KO#2 cells were pre-incubated with low (10 U/mL) and high (100 U/mL) concentrations of IFN-α for 16 h, respectively, or left unstimulated, followed by infection with VSV-Luc (MOI = 0.1) for 8 h.