This book takes the reader on a fabulous journey through the immune system, detailing how it workschallenging all of the body invaders attacking bacteria andviruses. It explains, among many disorders, cancer, allergies, AIDS and describes the results of the immune system failing to act, over-reacting, turning upon the body itself. The book opens the codes to the most complex system in the human body. Cures and preventions are explained, and those actions necessary to stay fit and enhance the immune system are examined.