MAPK9 and COVID-19: Interestingly, KDM4B regulated genes implicated in the coronavirus disease (COVID‐19) pathway, including MAP3K7, MAPK9, IRAK4, IL1B, MYD88, CXCL8, NFKBIA, IKBKE, IFNA7, IFNA5, C3, CFD, C5AR1, and TLR3,21, 22 as well as multiple ribosome proteins (Figure 2C, right panel, data not shown).