As shown in Figure 4A, and interestingly, both during infection with Arm/07-ΔMGF505-2R-GFP and NH/P68, higher IFN-β mRNA levels were produced, whereas during infection with the virulent Arm/07/CBM/c2 there was almost no IFN-β mRNA production. The gene discussed is IFNB1; the disease is infection.