As we arm ourselves for our battle with COVID-19, we must not forget zinc.  This is especially true for those over the age of 40, and the need increases with increasing age. According to the US Department of Agriculture, 73% of Americans are deficient in zinc, and deficiency is especially found in older people—even those who report taking zinc supplements.  Zinc is one of the foundation nutrients needed for building a strong immune system. Even a small deficiency can significantly impair immune function. Research over the past twenty years has shown that having adequate zinc reserves in cells inhibits replication of the coronavirus family of viruses, of which COVID-19 is a member. If a virus can’t replicate (reproduce itself), it can quickly and easily be eradicated by the immune system.  Zinc has also been shown to restore vigor to immune cells and to reduce excess inflammation. Controlling excess inflammation is extremely important in COVID-19 infections b…