Link between Vitamin D deficiency and more serious Covid-19 symptoms

To maintain "low-risk" levels (> 30 ng/mL), you need to either have a lot of sun exposure or supplement with 4000 IU daily, which is considered the "safe upper limit".

Getting there takes a while though, so if you are at a lower level, you can take a much larger dose for a few days - ask your doctor about that.

This leads me to several points:

1. What if AUS and NZ are doing fairly well because their population just megadosed on vitamin D as they just had their summer. 2. The same could be said for sunny california, but to a lesser extent 2. What if this is the reason why African Americans are particularly hard hit. Americans are typically Vitamin D deficient. Blacks, especially so. 3. What if closing the beaches is will make this worse, not better.

This makes me think of the vitamin d deficiency caused by air pollution, which has also been mentioned as a factor for speculations of high mortality rates with covid 19