Influenza Prevention...Tea This morning, I went to see my family doctor for a health consultation. The teacher likes black tea very much, so I give her a cup of black tea as a present. "Yes, it's been said that the catechins in tea are useful for prevention. What do you think?" Let's go!" So today, I got an influenza vaccination. Starting tomorrow, I'll be in Murakami, Niigata for coverage of the "JR East Adult Holiday Club". It's cold, but the effect of the vaccination will be several months away, so Murakami's local black tea will surely work faster to prevent colds. . . . !