MT-CYB and COVID-19: Plasma MT-CYTB levels were elevated in those subjects who died from COVID-19 [7.56 (7.15–7.81, n = 25)] compared with those who survived [7.23 (7.050–7.485), n = 72, P = 0.008, Figure 2A] and were associated with an increased risk for mortality on univariate logistic regression (OR 2.24, 95% CI 1.29–4.16, P = 0.006).