This new model I developed explains how the depletion of arginine and tryptophan and the sequestration of cysteine leads to T cell suppression in severe COVID and may reflect the rapid onset of a somewhat cancer-reminiscent state where vitamins A and D and other myeloid differentiation factors run out. The written version with references and links to research is available here: https://chrismasterjohnphd.substack.com/p/a-new-paradigm-for-severe-covid If you find this valuable, please like, share, and comment on the Substack article to help boost it within the Substack algorithm and get more people to read it. Vitamins A and D should be properly balanced with each other, and with vitamins E and K. My COVID-specific recommendations for this balance are in theCOVID Guide, and recommendations for balancing them in various different contexts are included in theVitamins and Minerals 101 Cliff Notes, both of which are freely available topaid Substack subscribers. These also contain general...