PPARA and influenza: The bubble plot of the enriched biological pathways revealed up-regulated genes in KEGG pathways that are mainly related to immune responses (i.e., cytokine–cytokine receptor interaction, influenza A, cytosolic DNA-sensing pathway, and RIG-I like receptor signalling pathways) and down-regulated genes in pathways mainly related to energy metabolism (i.e., nitrogen metabolism, PPAR signalling pathway, and AMPK signalling pathway).