Biography
Dr. Stewart Chang is Principal at Model Stewardship, a global health consultancy dedicated to model governance and the responsible application of modeling in decision-making. He previously served for 13 years as a Research Scientist and Research Manager at the Institute for Disease Modeling at the Gates Foundation. His work spans tuberculosis immunology, nutrition as a risk factor, geospatial modeling of infectious diseases, and projecting the impact of novel interventions to inform global health policy.
Key Impacts
Simulating the ACT3 trial: How TB natural history determines the durability of community screening
Our calibrated trial simulation enables causal decomposition of TB trends and highlights the risks of mischaracterizing natural history. When latent infections dominate, short-term screening alone may yield little lasting benefit. Until more direct measurements are available, simulation-based inference provides a practical way to estimate impact and assess whether individual control strategies are sufficient.
Source: Conference 2024