The results indicated six hub DEGs for comparison of T1DM and COVID-19 convalescence (CD3G, YES1, ALAS2, MYO1C, NCR3, PRKACB) and two hub DEGs for comparison of T2DM and COVID-19 convalescence (PTRF, EHD1). This evidence concerns the gene ALAS2 and type 2 diabetes mellitus.