Physicians refer to a long list of 25 reasons why the autonomic nervous system is not functioning properly in cases of COVID-19. The lack of thiamine, vitamin B1, is one of them. Intravenous thiamine/B1 therapy increases oxygen consumption. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4298978/ But entire explanations of how to treat long-term autonomic dysfunction in COVID-19 cases, including shortness of breath, don’t even mention vitamin B1, https://www.rcpjournals.org/content/clinmedicine/21/1/e63 which is not used till the patient is in the intensive care unit. Modern medicine casts a blind eye towards vitamin therapy. It is not mentioned in report after report. https://www.frontiersin.org/articles/10.3389/fneur.2021.624968/full https://respiratory-research.biomedcentral.com/articles/10.1186/s12931-020-01462-5 https://www.lewrockwell.com/2021/08/no_author/fixing-air-hunger-in-america/