SARS2 and infection: Titers permitted infections at an MOI of 1, and signal accumulated relatively fast, peaking at 5 h post infection (Figure 6A) At lower MOIs, we did not observe a second wave of luciferase produced, as seen with EBOV and LASV (Figure 4A and Figure 5A), which may relate to the poor titers produced with rVSV∆G/SARS2 (Figure 2C).