Does Vitamin D protect against Covid-19? Quite compelling evidence according to a Harvard professor of medicine.

According to JoAnn E. Manson, professor of Medicine at Harvard Medical School believes there is quite compelling evidence that vitamin D could protect against Covid-19.

https://www.medscape.com/viewarticle/930152

Dr John Campbell also believes there is evidence to show there is a correlation between vitamin D and Covid-19. 

https://www.youtube.com/watch?v=1fxw3nTZYlA