Susceptibility to the Coronavirus?

https://www.youtube.com/watch?v=cjUOpvmDE7k

Make Your Immune System Bulletproof Now

https://www.youtube.com/watch?v=F91E9SoIUHo

High Doses of Vitamin D Can Deplete Magnesium

https://www.youtube.com/watch?v=ZRjBPuj4q6I&feature=youtu.be