The top 20 pathways and GO terms (BP (Biological Process), CC (cellular component), and MF (molecular function)) enriched by 45 dif-mRNAs and 36 dif-miRNAs of spleens of the following groups: PD-1 antagonist treatment followed by A/PR8(H1N1) infection group vs. isotype control followed by A/PR8(H1N1) infection group. Here, PDCD1 is linked to infection.