ERBB4 and infection: Ectopic expression of WT ErbB4, whose depletion suppressed both infections most prominently (Supplemental Figure 5, C and E), either completely or partially reversed the antiviral effect of various concentrations of lapatinib on rVSV-SARS-CoV-2-S and VEEV (TC-83) infections (Figure 6, C–E, and Supplemental Figure 7, D–H).