Lei Guo is currently a Research Fellow in Health Policy and Systems at the Global Health Research Center, Duke Kunshan University, and a Senior Research Fellow at the Innovation Lab for Vaccine Delivery Research. He reports to Professor Shenglan Tang, Co-Director of the Center. His research focuses on vaccination service research, evaluation of public health interventions, and performance improvement in health systems. He leads a study on the cost and optimization of vaccination service delivery in Kunshan, contributes to evaluations of newborn screening programs for congenital heart disease and hearing impairment, and provides technical and managerial support to the Innovation Lab for Vaccine Delivery. He also participates in research projects on non-NIP (non-National Immunization Program) vaccines in China and supports work related to China’s achievement of health-related Sustainable Development Goals.

Previously, Lei worked with the World Bank, the Bill & Melinda Gates Foundation, and the Duke Global Health Institute in various research and consultancy roles. He contributed to studies on tuberculosis control, COVID-19 response, and health financing systems, and provided technical support on data analysis for pandemic response evaluations in the Gulf Cooperation Council countries. He has coordinated and supported collaborative projects with institutions such as the China National Health Development Research Center and Fudan University, and has supervised undergraduate students, graduate students, and interns in research.

Lei holds a Master of Science in Global Health from Duke University and a Bachelor of Science in Biomedical English from Peking University. His research has been published in international journals including PLOS Medicine, The Lancet Public Health, and BMJ Global Health. He has also contributed to multiple health policy reports, book chapters, and policy briefs. His research interests include immunization service delivery systems, health resource allocation, public health strategy analysis, and data-driven policy development.

Tianhui Ke joined Duke Kunshan University on January 2, 2024 as Research Fellow in Health Systems and Policy, reporting to Prof. Qian Long. She works on global health projects including literature review, research project development, fieldwork and quality control, data management and analysis, project report drafting, and other related tasks.

She received her Bachelor’s degree in Health Management and Communication from Nanjing University of Chinese Medicine in June 2019, and Master’s degree in Public Health from University of Melbourne in July 2021.

Previously, she worked at the Burnet Institute in Melbourne as a Research Assistant for two years. During the time she worked in Burnet, she has collaborated with a wide range of research partners to facilitate successful project implementation and also gained experience in participant engagement, survey building, data management and analysis.

Xiqian Feng joined Duke Kunshan University on May 6, 2025, as Research Fellow in Global Health Research Center, reporting to Full Professor of Global Health & the Co-Director of Global Health, Prof. Fujie Xu. Her main responsibilities include supporting research activities related to global health focusing on infectious diseases, conducting data analysis and literature reviews, coordinating with research partners, and assisting with administrative tasks and supporting on-campus academic events. She will contribute to the program’s mission of addressing major global public health challenges through interdisciplinary approaches. She received her Bachelor’s degree in Economics (major in Insurance) from Southwestern University of Finance and Economics in July 2022, and her Master’s degree in Managerial Economics from Nanyang Technological University in June 2023. Previously, she worked as a research assistant on multiple academic projects and served as a co-author on peer-reviewed publications.

Ziqi Liu joined Duke Kunshan University on April 1, 2025, as Research Fellow in Health Policy and System, reporting to Research Assistant Professor in Global Health, Prof. Xinyu Zhang. In this role, she works on a Gates-funded project on vaccine delivery in China and other health policy and system projects. Her main responsibilities include analyzing datasets, developing grant proposals, writing manuscripts under the guidance of the supervisor, and supporting student workers and interns’ research mentorship.

She received her Bachelor’s degree in Food Quality and Safety with a minor in English from Shandong Agricultural University in June 2023 and her Master of Science in Global Health from Duke University in May 2025.