It seems that there is concern it isn't a coincidence
https://www.theguardian.com/society/2020/apr/10/uk-coronavirus-deaths-bame-doctors-bma
Dr Campbell has spoken at great length about this. He thinks that the darker someones skin is the more difficult it is for them to produce VitD and Vit D is known to protect against respiratory tract infections. He says it would do no harm and might just do a lot of good to give them VitD tablets. On all of his blogs he does give links to his source material so that people can read them and interpret the findings themselves. There also seems to be a problem with doing studies based on ethnicity because it smacks of racism in some way; which is ridiculous if it can save someones life...I've been taking vit D supplement for a while now and am definitely going to spend this afternoon in the back garden.