This essential guide features a simple program of practical strategies to help optimize your immune system and improve your life.

Your immune system determines how well you live. In this must-read book, award-winning immunologist Leo Nissola provides a comprehensive overview of your body's defenses, revealing what can cause problems, how to recognize the warning signs, and how to fight back.

Every moment of every day, bacteria, viruses, and other germs attack you, but most of the time you stay healthy. You can't live forever, but there's more to fighting diseases than you might think, including diet, lifestyle habits, your environment, and the power of information. Dr. Nissola explains why enhancing your natural defenses should be your top health priority and details the cutting-edge therapies that researchers are developing to hack your immune system and bolster your defenses. Along the way, he explores the latest science on immune-boosting diets, supplements, and longevity while debunking myths about antibodies, inflammation, and why some people rarely get sick.

Featuring a complete, science-backed, step-by-step, full-body, seven-week action plan, this timely, all-inclusive handbook will help you support your body's defenses and maximize your health every day.