TNF and infection: In addition, we also found that the mRNA transcript levels of pro-inflammatory cytokines IL-1β, TNF-α, IL-6, and IL-12, and anti-inflammatory cytokines IL-4, and IL-10 tended to decrease (p < 0.05 or p < 0.01) in the cats from the feIFN-ω’ treatment group, compared with the FPV infection group.