Serum concentrations of pro-inflammatory factors [IFN-γ, IL-1β, IL-12, IL-6, IL-8, IL-18, IP-10, MCP-1, CC-chemokine ligand-2 (CCL-2), and CXCL-10] are positively connected with pulmonary fibrosis and significant lung tissue destruction in SARS-coronavirus patients, according to the latest research (Song et al., 2020; Rabaan et al., 2021) (Figure 3E). This evidence concerns the gene CCL2 and pulmonary fibrosis.