Byron Cohen

Byron Cohen

PhD Student, 2024
Population Health Sciences - Global Health and Population

Byron Cohen is a PhD candidate in Population Health Sciences at Harvard School of Public Health, based in the Department of Global Health & Population, in the Health Systems track. For part of his dissertation research, Byron uses epidemiological models to evaluate potential strategies for early detection and containment of outbreaks of potential pandemic pathogens that may occur as a result of accidental lab-acquired infections in high-biosafety research facilities. For…

Fayette Klaassen

Fayette Klaassen

Postdoctoral Fellow
Department of Global Health and Population

Fayette Klaassen is a Postdoctoral Researcher in the Department of Global Health and Population at the Harvard T.H. Chan School of Public Health, where she works on Bayesian statistical models to predict COVID-19 infections. She received her PhD in Methodology and Statistics from Utrecht University in 2020. In her doctoral research she focused on evaluating the efficiency of Bayesian hypothesis testing using inequality constraints. She is interested in developing and…

Diego Yizhi Liang

Yizhi Diego Liang

Master's Student, 2024
SM Candidate - Global Health and Population

Diego Liang is a master’s student studying in the Department of Global Health and Population at the Harvard T.H. Chan School of Public Health. His current research focuses on estimating trends in racial and ethnic disparities in the prevalence of syphilis among pregnant women in the United States. Diego is also working on developing fair clinical risk prediction models and equity-informed health decision-making. He has contributed to the investigation of…

allison portnoy

Allison Portnoy

Assistant Professor, ScD
Boston University School of Public Health Global Health, Harvard School of Public Health

Dr. Allison Portnoy is an assistant professor of global health focused on vaccine decision science and policy. Her research includes economic evaluation and public health policy, simulation modeling, health equity, and the impact of vaccination on population health and economic outcomes. She is particularly interested in broadening the value of vaccination in high-burden settings. Her ongoing work spans multiple diseases areas, including human papillomavirus (HPV), measles, and tuberculosis (TB). Dr.…

Do Kyung Ryuk

Do Kyung Ryuk

Research Assistant II
Department of Global Health and Population

Do Kyung Ryuk is a Research Assistant in the Department of Global Health and Population at the Harvard T.H. Chan School of Public Health. Her current research involves assessing tuberculosis treatment outcomes in Brazil and generating effective decision-making on health policy. Do holds a BA in International Studies from Kyung Hee University and an MS in Global Health and Population from the Harvard T.H. Chan School of Public Health.

Jinyi headshot

Jinyi Zhu

PhD Student, 2022
Health Policy - Decision Sciences

(Previous Bio) Jinyi Zhu completed her Ph.D. in Health Policy (Decision Sciences track) at Harvard University. Jinyi holds a BS in Biological Science and a BA in Economics from Peking University, and an MPH in Health Policy from the Yale School of Public Health. Jinyi has broad research interests in resource prioritization and disease simulation modeling of TB/HIV and CVD, as well as the associated methodological issues, including model calibration…