Dr. Nancy Leung Hiu-lan, lead author of the highly cited studyRespiratory virus shedding in exhaled breath and efficacy of face masks, discusses the inspiration, process, and attention surrounding her research. The study, which took eight years to complete, found that surgical masks can be effective in preventing transmission from symptomatic people. Dr. Leung also addresses the mask vs. no mask debate, the role of scientists in public communication, and her current research on immunity differences between individuals.