There are more than 3 million U.S. cases per year of the flu. It is an extremely common infection that can be deadly, especially in high-risk groups. While proper hygiene is to cover your mouth when you cough or sneeze, people don't always do that, almost guaranteeing that the tiny droplets of contagion will find a new host to infect. You can't always stay away from people who are sick either, so this condition just keeps going, relying on the variants that keep us exposed. This guidebook provides your readers with the straight facts. They will learn the history of our experience with the flu, its symptoms, diagnosis, and treatment. An entire chapter is dedicated to preventing the flu, which is a must-have set of information. Readers will also learn about flu pandemics and what the future may hold.