Fig. 4
From: Rescue and evaluation of a recombinant PRRSV expressing porcine Interleukin-4
Concentrations of Th1-type (IFN-γ) and Th2-type (IL-4) cytokines in the sera of pigs. Serum samples were collected from five pigs in each group at different time points and quantitative ELISA kits were used to detect level of IFN-γ (a) or IL-4 (b). The CH-1R vaccinated group was compared to the recombinant vaccinated group and * denotes p < 0.05. Data represent the mean ± SD of five pigs from each group