Figure 2

Levels of IFN-γ secreting cells (SC) in all vaccinated pigs against the PRRSV vaccine strain at different time-points post-vaccination by ELISPOT. Vaccinated pig groups were classified according to the intensity of the cellular mediated immune responses against the vaccine: “High responder” (HR) group comprised by pigs with the highest levels of IFN-γ-SC responses (black circle), the “Low responder” (LR) group with pigs with the Lowest IFN-γ-SC levels (grey circle) and other vaccinated pigs with intermediate IFN-γ-SC responses (white circle). The unvaccinated control group was not shown in the graph since all animals showed no specific response. *Statistical differences (P < 0.05).