So, I cannot read the article without disabling adblocker, which I won't do, but here is their source anyway: https://www.bumc.bu.edu/busm/2020/09/25/adequate-l

So, I cannot read the article without disabling adblocker, which I won't do, but here is their source anyway: https://www.bumc.bu.edu/busm/2020/09/25/adequate-levels-of-vitamin-d-reduces-complications-death-among-covid-19-patients/ https://www.bumc.bu.edu/busm/2020/09/25/adequate-levels-of-v... This is the nth study to talk about this. It's pretty well demonstrated by now that there is a correlation between vitD levels and covid-19 mortality. What is not clear is: - given that a deficiency is bad, does it matter if you have more than just the normal amount? In other words, does this only matter if you have a deficiency? - given that sunlight increases natural vitamin D production, could it be, not the vit D per se, but rather the sunlight exposure, that has the beneficial effect? - could this even just be a case of healthy people getting out more, hence getting more sunlight and thus vitamin D, and healthy people also dying less from covid-19 (or almost anything else)? What I would like to see is a study where they increase vit D levels, sunlight levels, both, or neither, and compare the mortality rates. If you don't feel it's ethical to do the neither option, you could compare to previous averages when neither was done. So far I have seen no evidence that this is being done, but hopefully soon?