Shared genes enriched KEGG pathways included cytokine-cytokine receptor interaction, viral protein interaction with cytokine and cytokine receptor, TNF signaling pathway, NF-kappa B signaling pathway, IL-17 signaling pathway, rheumatoid arthritis, influenza A, Toll-like receptor signaling pathway, measles, and chemokine signaling pathway (Figure 4E; Supplementary Table S4). Here, TNF is linked to rheumatoid arthritis.