Endogenous Deficiency of Glutathione as the Most Likely Cause of Serious Manifestations and Death in COVID 19 Patients ACS Infectious Diseases Excitotoxicity and Neurological Post COVID 19 Syndrome: Exploring Possible Connections of Pathophysiological Mechanisms Frontiers Understanding Selenium and Glutathione as Antiviral Factors in COVID 19: Does the Viral Mpro Protease Target Host Selenoproteins and Glutathione Synthesis? Elevated plasma level of the glycolysis byproduct methylglyoxal on admission is an independent biomarker of mortality in ICU COVID 19 patients Scientific Reports Coronavirus Pandemic Update 70: Glutathione Deficiency, Oxidative Stress, and COVID 19