COVID 19 patients have increased oxidative stress, oxidant damage, and glutathione deficiency BCM Frontiers Understanding Selenium and Glutathione as Antiviral Factors in COVID 19: Does the Viral Mpro Protease Target Host Selenoproteins and Glutathione Synthesis? Roche's antibody cocktail lowers hospitalisation by 70% in Covid 19 patients Endogenous Deficiency of Glutathione as the Most Likely Cause of Serious Manifestations and Death in COVID 19 Patients DURAMENTAL healthy cells healthy people