Further, transcriptomic analysis of bronchoalveolar lavage (BAL) of COVID-19 infected patients indicated increased levels of the cytokines monocyte chemoattractant protein-1 (MCP-1) and interferon gamma-induced protein 10 (IP-10), which despite being NK cell migration regulators were identified as biomarkers associated with disease severity and fatality [39–41]. Here, CCL2 is linked to COVID-19.