Chat about Novel Coronavirus - 2019-nCoV - COVID-19

I remember Vitamin D is quite a popular topic in this thread:

Results revealed that majority of the death cases were male and older and had pre-existing condition and below normal Vitamin D serum level. Univariate analysis revealed that older and male cases with pre-existing condition and below normal Vitamin D levels were associated with increasing odds of death. When controlling for age, sex, and comorbidity, Vitamin D status is strongly associated with COVID-19 mortality outcome of cases.

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3585561