SEMA6D and COVID-19: By 6 weeks post-inclusion, COVID-19 hypermethylation of genes with the highest fold-change compared to healthy controls included FAM178B, FYN, TMCC1, TMEM212-AS1, and FIG4, while the top five hypomethylated genes were GIT2, PDGFRB, SEMA6D, TNFAIP8, and ETV6.