IL7 and COVID-19: There are already numerous studies showing that inflammatory cytokines such as IL-1, IL1RA, IL-2, IL-4, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12, IL-13, IL-17, basic FGF, GCSF, GMCSF, IFN-γ, IP-10, MCP-1, MIP-1A, CCL-4, PDGF, TNF-α and VEGF can be detected in COVID-19 plasma samples [9–12].