https://www.researchsquare.com/article/rs-21211/v1

http://archive.is/UoIkm

The role of Vitamin D in the prevention of Coronavirus Disease 2019 infection and mortality

Results: The mean level of vitamin D (average 56mmol/L, STDEV 10.61) in each country was strongly associated with the number of cases/1M (mean 295.95, STDEV 298.73 p=0.004, respectively with the mortality/1M (mean 5.96, STDEV 15.13, p < 0.00001).

Discussion: Vitamin D levels are severely low in the aging population especially in Spain, Italy and Switzerland. This is also the most vulnerable group of population for COVID-19.

Conclusions:We believe, that we can advise Vitamin D supplementation to protect against SARS-CoV2 infection.