CCL2 and COVID-19: In addition, our results reveal that high levels of macrophages chemoattractant CXCL10/IP-10 and CCL2/MCP-1 and neutrophil chemoattractant CXCL2 and CXCL8 facilitate the migration of these immune cells to the site of infection, which was consistent with mononuclear cell infiltrates in lung tissues of COVID-19 patients [17].