There is a biological force within the body that wants you to live to old age. While conventionally this force is known in medicine as the immune system, Dr. Bob calls it: "The Biological Soul." The Biological Soul is designed to protect you and allow you to live a healthy life. This force is tangible, measurable, lives within the physical body and determines our age and wellbeing through life. It is physical and complex and, in many ways, spiritual. It is affected by life's stresses, by diets, and by overall health and though not immortal; it both shapes your life and your life shapes it. IMMUNITY STRONG walks readers through how the immune system works, what makes it implode or keeps it safe and what modern science reveals about how it connects to every part of the body to keep it alive--as the seat of our "Biological Soul."