Fig. 2

The relative expression of hsa-miR-31-3p (a), hsa-miR-29a-3p (b), hsa-miR-126-3p (c), and hsa-miR-17-3p (d) in COVID-19 patients with grades 1–5. *Indicates significant difference when compared with grades 1–3 by one-way ANOVA. The relative expression of hsa-miR-31-3p, hsa-miR-29a-3p, hsa-miR-126-3p, and hsa-miR-17-3p in COVID-19 patients who did not respond to treatment (e) and in COVID-19 patients who respond to treatment (f) during hospitalization. *Indicates significant difference when compared with week 0 by one-way ANOVA. Arrows indicate the trend of miRNA during hospitalization