Here's a link to the paper: https://www.medrxiv.org/content/10.1101/2020.05.06.20092999v... This is interesting data. I want to see Vitamin D status included in a large population study like this because I've been following two smaller studies covering about a thousand cases total that shows Vitamin D deficiency has a risk ratio of 10 to 20 (more even than being age 80+ in the above study). The studies: [1] https://p…
In case you weren't aware, controlled trials have shown that vitamin d supplementation protects against respiratory disease [1]. This is evidence that the association you highlight is more than a spurious correlation. It's likely to be causal. [1] https://www.bmj.com/content/356/bmj.i6583
It may explain why heavily indoors NYC had so many lethal cases, even as most infected were already keeping themselves indoors.