The Daishonin warns in his teaching, "Be millions of times more careful than ever."* Let’s be careful not to catch a cold and/or get the flu. By washing our hands, gargling, etc, let's take all possible precautions to stay healthy.
*The Hero of the World, WND 1, page 839
Translation of "To My Friends" published in the Seikyo Shimbun, based on President Ikeda's recent guidance, with universal value and application