Figure 5: Proliferation of CD4+ and CD8+ cells after stimulation by PPV or PCV2 in mice that were vaccinated with (a) pIRES-VP2, (b) pIRES-ORF2, (c) pIRES-VP2-ORF2, (d) PIRES, or (e) PBS. a: A: Un-stimulated B: PPV-stimulated. b: A: Un-stimulated B: PCV-stimulated. c: A: Un-stimulated B: PPV-stimulated C: PCV2-stimulated. d: A: Un-stimulated B: PPV-stimulated C: PCV2-stimulated. e: A: Un-stimulated B: PPV-stimulated C: PCV2-stimulated.