ESR1 and COVID-19: Results, such as CRP (rs = 0.244, p ≤ 0.001) or D-dimer (rs = 0.426, p = 0.001), concerning the correlation between length of hospitalization and biomarkers, are supported by the scientific literature, which indicates that inflammatory markers, such as CRP and ESR, are associated with disease severity and more extended hospitalization in viral infections, including COVID-19 [98].