When cold and flu season strikes, many doctors find themselves on the front lines of infection. In this article from ABC News, reporters talk to several physicians about which medications, herbs, and vitamins they take to help them stay healthy during the sneezing season. The doctors discuss many well-known natural remedies, such as green tea, vitamin C, and zinc. But they also address other, lesser-known remedies such as Siberian ginseng, hydrotherapy, and black elderberry extract.