IFNAR1 and infection: At 20 h post-infection, IFNAR−/− BMMCs, which over-expressed cytokines (Figure 5), had a lower number of viable cells than IFNAR-blocked and -intact BMMCs (Figure 6B), both of which had relatively lower-magnitude cytokine responses (Figure 5) (651.75 ± 364.06 cells versus 2545.75 ± 520.85 cells versus 3316.25 ± 645.55 cells, respectively).