Re: Is ethnicity linked to incidence or outcomes of covid-19?
The role of vitamin D deficiency as a cause of predisposition to Covid-19 is an interesting one, but it is one of several explanations, the prime one being genetic. I would also be interested to see whether there is a religious, rather than an ethnic difference. I am not aware that the Asian subgroup has been divided this way. It is of interest because one would expect a higher incidence of Vitamin D deficiency among vegetarian Hindus than among non-vegetarian Muslims.
Competing interests: No competing interests