there are issues with vitamin D and cytokine storm....perhaps that is why
its a mixed bag with different schools of thought
I follow the one I saw on texags
take vitamin D until you get covid and then make sure your levels stay up
not going to do a vitamin D hammer if I get it unless covid takes my levels down
btw, similar mixed bag with Sambucol and elderberry
“Experts say healthy blood levels of vitamin D may give people with COVID-19 a survival advantage by helping them avoid cytokine storm, when the immune system overreacts and attacks your body’s own cells and tissues.”
https://www.webmd.com/lung/news/20200518/more-vitamin-d-lower-risk-of-severe-covid-19
Most of what i read about D says it helps prevent the Cyotkin storms