Figure 2From: A novel live attenuated duck Tembusu virus vaccine targeting N7 methyltransferase protects ducklings against pathogenic strains Viral copies number in sera at 2, 4 and 6 dpi were measured by RT-qPCR. Each of these was conducted with three parallel replicates. Bars show means ± SDs. ***P < 0.001; **P < 0.01 (two-way ANOVA). ND, Not detected.Back to article page