In this study, we aimed to investigate the role of GIP-10, Galectin-3 (Gal-3), and hypoxia inducible factor 1 (HIF-1) in PF-associated COVID-19 and the effectiveness of the Pfizer vaccine against the progression of PF and inflammation through evaluating these three biomarkers and their correlation with a few hematological parameters. The gene discussed is CXCL10; the disease is COVID-19.