For two weeks I am participating in a course at the Harvard School of Public Health entitled “Building Design and Engineering Approaches to Airborne Infection Control.” The course is a collaborative endeavor between Harvard, Brigham and Women’s Hospital, Partners and Health, and the Mass Design Group. We have an energetic group of students from around the world. The course is focused on engineering and architectural approaches to reducing TB transmission in congregate settings (i.e. natural ventilation, mechanical ventilation, Ultraviolet Germicidal Irradiation, etc). We are measuring pressure gradients in negative pressure rooms, learning about computer aided design programs, and climbing on building rooftops inspecting ventilation systems. I wish I had taken this course 5 years ago, before I started working in Mozambique. We would have been much more effective in our efforts to improve TB infection control at Maputo Central Hospital. The HSPH course demonstrates the importance of engineering approaches for making health care facilities safer.