This book introduces readers to the history and discovery of viruses and bacteria, provides an accessible overview of how several major pandemics have influenced the society and how vaccines and antibiotics were developed. With colorful illustrations, it narrates the fascinating stories behind 17 common infectious diseases. From this book, you will learn about pathogenic characteristics, main symptoms, transmission routes, as well as prevention and control strategies. By highlighting the difficulties in the struggle against infectious diseases, the book pays homage to the efforts, the scientific spirit and the great contributions of scientists. With the pandemic still raging around the globe, it is hoped that this book will broaden people's horizon, arouse their interest and strengthen their confidence.