Fig 3.

Analyses of CD4⁺ CD8⁺ double-positive cells (A) and CD4⁺ cells (B) in PBMCs from the different groups. From left to right, the bars indicate the following groups: pigs which received the PCV2 vaccine followed by PCV2 challenge only (group 1), pigs which received the PCV2 vaccine followed by dual challenge (group 2), pigs which received the PRRSV vaccine followed by PRRSV challenge (group 3), pigs which received the PRRSV vaccine followed by dual challenge (group 4), pigs which received both the PCV2 and PRRSV vaccines followed by dual challenge (group 5), pigs which were challenged with PCV2 (group 6), pigs which were challenged with PRRSV (group 7), pigs which were challenged with PCV2 and PRRSV (group 8), and negative-control pigs (group 9). Different letters (a, b, and c) indicate significant (P < 0.05) differences between groups.