Accumulating evidence suggests that some patients with severe COVID-19 suffer from a “cytokine storm.” Analysis of cytokine levels in plasma of 41 COVID-19 confirmed cases in China revealed elevated levels of IL-1β, IL-7, IL-8, IL-9, IL-10, FGF, G-CSF, GM-CSF, IFN-γ, IP-10, MCP-1, MIP-1A, MIP1-B, PDGF, TNF-α, and VEGF in both patients admitted to the ICU and non-ICU patients compared to healthy adults. This evidence concerns the gene IL9 and COVID-19.