It is well known that viruses cannot survive by themselves without a host, which for us is our bodies. Viruses stick to the mucous membranes where they find nutrition and multiply. Studies in Japan have identified a substance called Epigallocatechin (EGCG) that may prevent viruses from sticking to cell walls. Of all the catechins in Green Tea, this one is the most powerful antioxidant.
But drinking green tea alone will not prevent illness. It is a supplement to the usual preventives such as regular hand washing, healthful eating habits, daily exercise, and getting sufficient sleep.
Enjoy green tea for the pleasure of it, too!