IFNB1 and infection: In separate studies, we found that expression of IFN-β was upregulated at 24 and 48 hpi during rVSV/EBOV GP infection but did not rise above baseline levels during EBOVΔVP30 infection from 6 hpi through 48 hpi, further supporting the absence of antiviral responses to EBOVΔVP30 (Figure S4).