The book tells the story of scientists, doctors, and patients exploring life-or-death challenges, constantly pushing the boundaries of knowledge, and seeking therapeutic solutions. Through decades of exploration, they have discovered various pathways for the immune system to fight cancer, ushering in a new era of cancer treatment. This book introduces you to the progress of human understanding of cancer from a new immune perspective, exploring the past and present of scientific and technological hotspots. Through compelling stories, you will learn about the origin, development, and future of cancer immunotherapy. You can build a knowledge system for cancer prevention and treatment in a short time, better protecting yourself and your family.