Indeed, almost all subtypes of monocytes from individuals with Delta COVID-19 were characterized by higher expression of STAT1, PRDM1, EGR2, ATF5, NFE2L2, BACH1, MAFF, MSC, PURA, GABPA, ETS2, ATF3, and ZEB2 (Supplementary Figure S16). Here, BACH1 is linked to COVID-19.