流感主要是病毒附在鼻子和嗓子中突起的粘膜细胞上不断繁殖而致病的。经常用茶水漱口，儿茶素能够覆盖在突起的粘膜细胞上，防止流感病毒和粘膜结合，并杀死病毒。他们说，乌龙茶、红茶和日本茶中都含有儿茶素，但绿茶预防流感的效果最好。霍乱菌专家稻村教授早在１９８８年就 The flu is mainly caused by the virus that multiply on the mucosal cells protruding in the nose and throat. Often gargle with tea, catechins can cover the protruding mucosal cells, to prevent influenza virus and mucosal binding, and kill the virus. They say catechins are contained in oolong tea, black tea and Japanese tea, but green tea is best at preventing flu. Cholera specialist Professor Inamura was back in 1988