Figure 4. Intersect genes and functional enrichment analysis. (A) Venn diagram of the intersect genes of DEGs of COVID-19, IS and WGCNA hub genes of COVID-19. (B) Gene Ontology (GO) analyses for intersect genes. (C, D) Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis of intersect genes. (E, F) Gene set enrichment analyses (GSEA) of GSE171110.