In On Immunity the brilliant Eula Biss explores the metaphors pervading our discussions about illness, immunity, and health. Biss draws on medical history, literature, popular culture, and recent medical research to suggest that our aversion to vaccinations speaks to our desire for personal purity and our fears about industrialization. She argues elegantly for the perspective that our bodies are permeable, interconnected, and drawn toward a common fate. This book is a potent antidote to the undeniably ubiquitous paranoia of post-industrial life.