Vitamin D Determines Severity in COVID-19: Researchers Urge Government to Change Advice - https://scitechdaily.com/vitamin-d-determines-severity-in-covid-19-researchers-urge-government-to-change-advice/

This is particularly important for those with dark skins and may well account for the higher mortality rate amongst black people who catch it. I found this a dreadful omission in an otherwise worthy article.