An immunologist, allergist, and functional medicine doctor breaks down the latest science on immunity, offering a program to help identify one's unique immunotype and balance the immune system for optimal health and longevity.

"Optimize your natural defenses with this essential, science-based guide and its simple program of practical strategies to help support your immune system. In this must-read book, immunologist Leo Nissola provides a comprehensive overview of your body's defenses, revealing what can cause problems, how to recognize warning signs, and how to fight back. Every day, bacteria, viruses, and other germs attack you, but you stay healthy most of the time....

"Some people can fight off infections relatively easily, with minor symptoms, while others suffer severely. But these outcomes--and our immune responses against them--aren't fixed; we can build immune resilience. But how? The answer goes beyond popping vitamin C and zinc during flu season. As clinical nutritionist Romilly Hodges reveals, our immune system is intricate and multifaceted, and powerfully impacted by what we eat, as well as by our lifestyle...