Another study reported higher serum levels of IL-6, IL-7, IL-10, granulocyte colony-stimulating factor (G-CSF), M-CSF, IP-10, monocyte chemoattractant protein-1 (MCP-1), MCP-3, MIG, and macrophage inflammatory protein 1α (MIP1α) is severe COVID-19 patients. The gene discussed is CCL2; the disease is COVID-19.