Fig. 4From: Optimized protocol for double vaccine immunization against classical swine fever and porcine reproductive and respiratory syndromeEffects of different immunization protocols against CSF and PRRS on the concentration of IFN-γ in swine. (A–H) Concentrations of IFN-γ at the indicated time points after vaccinations. Note: the bars are the respective standard deviation. Data are shown as the mean ± SD, and different letters (a, b, c) and (*) above the bars indicate significant differences (P < 0.05) as in Fig. 1; (ns) indicates no significant differences among S + PRRS, S-PRRS, PRRS-S and control groups within different immunization time (P > 0.1)Back to article page