Corona: A “Striking” Link Between Low Vitamin D Levels and Omicron! Low levels are associated with the severity of Covid. Researchers cautioned that vitamin D was only “one piece of the complex puzzle” underlying cases of severe COVID-19. It alone doesn’t constitute proof of cause. Yet it does seem to serve as a useful marker to flag individuals who may go on to develop serious illness https://www.psychologytoday.com/us/blog/the-fallible-mind/202202/striking-link-between-vitamin-d-levels-and-omicron