Plasma MT-CYTB levels were also elevated in those subjects with COVID-19 who ultimately had end organ dysfunction requiring vasopressors [7.63 (7.35–8.02), n = 29] compared with those who did not require vasopressors [7.20 (7.04–7.43), P < 0.0001, n = 68, Figure 4A]. This evidence concerns the gene MT-CYB and COVID-19.