Do the catechins in green tea act as a natural antiviral against covid 19?

Apr 2, 2020
Multiple studies have been done showing the catechins in green tea have antiviral effects against many viruses. Looking for confirmation we see that Japan has a death toll over a hundred times lower than ours, about 900 deaths from the coronavirus-much lower also than most countries in europe. Japan has an older population and they never shutdown fully, but they drink more green tea than any other country per capita. So is it possible that green tea has been acting as a natural vaccine in Japan? Because the evidence that there is something going on is strong-less than a thousand deaths with no full shutdown and an older population-it seems worth looking into as green tea has almost no adverse side effects.