Moreover, transcriptional analysis of BALF and PB mononuclear cells confirmed substantially high level of chemokines, such as IFN-inducible protein 10 (IP-10) and monocyte-chemotactic protein-1 (MCP-1), among others, which might help macrophages in infiltrating the site of tissue and/or organ infection in COVID-19 patients, and this rationale is found to be consistent with autopsy reports as well [63]. Here, CCL2 is linked to infection.