Figure 3 Gene Ontology and KEGG enrichment analysis of 268 differentially expressed genes (DEGs) in severe COVID-19. The top 10 terms in (A) molecular function, (B) cellular component, and (C) biological process category are presented. The total of 8 significant pathways involved in (D) KEGG enrichment are shown using a scatter plot. Colors represent the P values and sizes of the spots represent the counts of genes.