Such a reaction, known as a cytokine storm, involves the release of potentially overwhelming amounts of pro-inflammatory cytokines and chemokines into the blood stream of COVID-19 patients including, but not limited to, IL-6, TNF-α, INF-γ, CXCL9 and CXCL10 [44, 46]. This evidence concerns the gene CXCL9 and COVID-19.