We know that, nationwide, the pandemic has claimed a disproportionate number of African Americans lives.
I only scanned the article, but I would bet my allowance that there was no mention of Vitamin D.
Vitamin D (it's really a hormone) is an effective antiviral substance for many bugs, including influenza (that's a big reason why the flu subsides every late spring and summer.)
Vitamin D is formed when skin is exposed to sunlight. We all make it, and we make more of it during the sunny months, at lower latitudes, and humans of color make less of it due to the nature of the melanin content in their skin.
There is no racism component. Persons of color are victims only of their own natural Vitamin D deficiency; and it's easily correctable. Over-the-counter vitamin D3. It's cheap, and one suspects the difference in china-Virus outcomes between dark and fair-skinned humans. Every US Citizen should consider either getting a little extra sunning time (don't burn, okay?) or prudently supplementing with Vitamin D3.
Easy breazy, take the D3.
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I don’t know I would push Vitamin D as a “cure”. We know it helps bone density, that’s reason enough to monitor and correct it. I had one patient tell me after starting Vitamin D, “Now I can think clearly again!”. I wouldn’t rush out and start claiming I had found a cure for Alzheimer’s based on that. Unless maybe I was French.