Guardian article on black people's Covid19 mortality with not a single mention of vitamin D deficiencies which seems to me like a plausible explanation worthy of investigation. Certainly, I'd like to see it eliminated before people jump to other conclusions.
@isagalaev Dr John Campbell is a teaching nurse with a PhD who's been doing a series of videos on medical matters, most recently daily or more on Covid-19 data. Here's one specifically about Vitamin D:
He also described, in a more recent video, a non-peer-reviewed Indonesian study of (IIRC) 720 patients where, after matching for other factors, those with low VitD had a 10:1 higher mortality rate.
Not conclusive but very indicative.
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