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The Harvard Chan School's Master of Science program equips you to drive meaningful change in laboratories, fieldwork, or policy development. Graduates of this program hold influential positions across academia, research centers, biotech firms, healthcare systems, government bodies, NGOs, and various public and private sector organizations. Throughout their studies, Master of Science candidates develop solutions for pressing health and scientific issues impacting both individuals and communities. They cultivate specialized knowledge while integrating perspectives from diverse public health fields. The program provides robust analytical, technical, and quantitative training applicable across numerous professional trajectories. As a student, you'll contribute to public health science through original laboratory or field investigations, learn to assess research literature critically, and apply scientific principles in practical contexts. The Environmental Health Department conducts groundbreaking research and delivers cross-disciplinary education, focusing on how air quality, water systems, food contaminants, consumer products, urban design, and workplace conditions fundamentally shape population health. Researchers investigate disease mechanisms, injury prevention, ergonomic solutions, climate impacts, industrial hygiene, and sustainable environmental practices. Faculty members pioneer evidence-based public health improvements through studies spanning molecular biology, exposure analysis, engineering solutions, epidemiological research, risk evaluation, and policy assessment.