Corona: Vitamin D deficiency can lead to severe disease progression

Last year, we already pointed out the negative health consequences of a widespread vitamin D deficiency among Europeans. Now, an Israeli scientific study shows a connection between low vitamin D levels and severe courses of corona disease:

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0263069

Obviously, much needs to be investigated further, but what is clear is:

Vitamin D helps to strengthen the immune system. Viruses that attack the lungs are fought more effectively.

Vitamin D is "one piece of the complex puzzle" underlying severe COVID-19.

You cannot get vitamin D in significant amounts from food. In summer, human skin produces enough vitamin D even in Europe if you expose it to the sun for some time every day. But now, shortly after the end of the dark season, most Europeans suffer from a vitamin D deficiency.

Remedy is very simple and costs little: https://hyp-tech.com/en/gadgets/elite-vitamin-k2d3.html