What is the flu?What are the main signs and symptoms of the flu?How is the flu diagnosed?What are some of the main medical treatments for the flu?Have any supplements been studied for the flu?How could diet affect the flu?Are there any other treatments for the flu?What causes the flu?Can you boost the flu shot with prebiotics and probiotics?Should you “feed a fever” (when it’s caused by the flu)?Why is the flu seasonal?Which supplements can help against colds and the flu?