This book is intended to show the great achievements and valuable experience of Chinese public health practices and epidemiological theories and methods. It is conducive to expanding medical workers’ practical ability of disease prevention and control, and to bridging the gap between clinical medicine and public health. In part 1, it introduces the progress in epidemiology of 10 infectious diseases. In part 2, it covers 11 non-communicable diseases. The research method and prediction modelling and public health ethics are discussed in the 11 chapters of part 3. The contributors include epidemiologists and public health experts, as well as more clinicians, mathematicians, sociologists, philosophers (ethicists), bioinformatics and so on. Among them, there are not only professors from universities, but also researchers from scientific research institutes, and experts in the front line of disease prevention and control.