Bruno J. Strasser is a historian of science and medicine known for his work on the history of health, technology, and environmental risk. He is the author of *The Mask: A History of Breathing Bad Air*, published by Yale University Press in 2025, which traces the development and use of masks from early industrial pollution and infectious disease through modern public health and environmental crises. The book situates masking within broader histories of air quality, labor, war, and scientific expertise, drawing on global case studies and archival research. Strasser’s scholarship examines how scientific knowledge circulates between laboratories, public policy, and everyday life, with particular attention to how societies respond to invisible threats to health.