Figure 4

Frequencies of virus-specific IFN-γ-SC after stimulation with (A) homologous viruses (vaccine viruses), (B) heterologous HP-PRRSV-2 (FDT10US23) virus, and (C) heterologous PCV2 (S1918STC) virus. Values expressed as mean ± SEM. The results were compared using two-way ANOVA for multiple comparisons. Different lowercase letters (a–d) indicate significant differences between treatment groups (p < 0.05) for each time-point.