Figure 2. Visualization and analysis of the differentially expressed genes (DEGs) in COVID-19 and IS. (A) Heatmap clustering of genes with markedly different expression in COVID-19 compared with normal samples in GSE171110. (B) DEGs volcano map in COVID-19 compared with normal samples in GSE171110. (C) Heatmap clustering of genes with markedly different expression in IS compared with normal samples in GSE16561. (D) DEGs volcano map in IS compared with normal samples in GSE16561. |log2Foldchange|> 0.5 and adjusted P-value < 0.05 were used to define statistically significant DEGs.