The receiver operating characteristic (ROC) analysis demonstrated that the following chemokines: MIP-1α, IP-10, and MIG, and the following GFs: basic-FGF, HGF, SCGF-β, G- CSF, M-CSF, and MIF can be useful parameters for diagnosing COVID-19 patients (Table 3). The gene discussed is CXCL9; the disease is COVID-19.