CRP and COVID-19: Based on the correlation analysis between miRNAs and laboratory markers presented in Figure 3, the severe COVID-19 group, which exhibited significantly upregulated expression levels of miR-21, miR-155, miR-let-7, miR-146a, and miR-223, showed significant positive correlations with platelets (p < 0.01), CRP (p < 0.001), HB% (p < 0.01), urea (p < 0.02), and D-Dimer (p < 0.05), and significant negative correlations with RBCs (p < 0.001) and Fasting Blood Sugar (FBS) (p < 0.05).