“This book is a masterclass in science communication. Davis unravels one of the most complex and vital elements of human biology, our immune system. Self-Defense disentangles the science of immunity and addresses some of the key questions we all want answered. Does orange juice really help us fight off colds, prevent us getting cancer, or combat HIV? Do increased infections in early childhood protect against allergies, and is it true that children who grow up on farms are less likely to have asthma and hay fever? How might our genes or gut bacteria alter our vulnerability to infection? What is the link between obesity, stress, and sleep with our ability to fight infection? And does our immune system affect our mental health and the aging process? This is essential reading for anybody who wants to understand their health.”—Russell Foster, neuroscientist and author of Sunday Times-bestselling “Life Time”

“Self-Defense: A Myth-Busting Guide to Immune Health uncovers how curiosity-driven science can help you truly understand and optimize your immune system—free from hype, misconceptions, and the traps of mistaking coincidence for causation. From the surprising links between cytokines and mood to the effects of stress on immunity, this book reveals how our biology shapes us in unexpected ways. With stories like how a glowing jellyfish transformed medical research, it shows how simple discoveries can lead to profound insights. Dive in to see how thoughtful, evidence-based exploration can lead to better health, resilience, and self-awareness.”—Roger Highfield, science director at the Science Museum Group (London) and coauthor "The Dance of Life"

“A fascinating guide to the immune system, cutting through the myths with clear, evidence-based science. Davis empowers readers to make informed choices about their health in a world of so much misinformation.”—Rhiannon Lambert, award-winning nutritionist (@rhitrition), co-host of The Wellness Scoop with Deliciously Ella, and Sunday Times-bestselling author of “The Science of Nutrition”