CSF3 and COVID-19: Furthermore, Huang et al. recently reported a cytokine profile resembling sHLH (characterized by increased IL-2, IL-7, granulocyte colony-stimulating factor [G-CSF], IFN-γ-induced protein 10 [IP-10], monocyte chemo-attractant protein 1 [MCP-1], macrophage inflammatory protein [MIP] 1-α, and TNF-α) is associated with the severity of COVID-19 [4].