In addition, some studies found that the levels of IL‐2, IL‐4, IL‐6, IL‐7, IL‐10, IP‐10, MCP‐1, TNF‐α, MIP‐1α, IFN‐γ, and G‐CSF in patients with severe COVID‐19 infection were significantly higher than those in patients with mild and moderate infection.13, 53, 54. This evidence concerns the gene IL2 and infection.