See also this: https://www.sciencedirect.com/science/article/pii/S1871402120301156 https://www.sciencedirect.com/science/article/pii/S187140212... > COVID-19

See also this: https://www.sciencedirect.com/science/article/pii/S1871402120301156 https://www.sciencedirect.com/science/article/pii/S187140212... > COVID-19 appears to disproportionately affects black and minority ethnic individuals. The underlying mechanism is unknown. > One potential mediator could be their higher prevalence of apparent vitamin D deficiency. > We explored whether blood 25 hydroxyvitamin D (25(OH)D) concentration was associated with COVID-19 risk. > We found no evidence that (25(OH)D) explains susceptibility to COVID-19 infection, either overall or between ethnic groups.