Yi-Fang (Ashley) Lee
MHA
ASSOCIATE DIRECTOR, Value Evidence
Durham, NC
"Kindness is a language which the deaf can hear and the blind can see."– Mark Twain
Areas of Expertise
- Health Economic Modeling
- Evidence Synthesis
- Data Analysis
- Health Policy and systems research
Biography
Ashley Lee is an Associate Director within the Value Evidence team. She is a health economist and outcomes researcher with a background in pharmacy and public health. She brings a strong academic foundation and has collaborated extensively with industry and global health partners on initiatives in health economics, outcomes research, and evidence generation. Her work supports access strategies and informs policy decision-making across a range of therapeutic areas.
Prior to AESARA, Ashley led and contributed to research involving economic modeling, real-world data analysis, and systematic literature reviews. Her work has helped demonstrate the value of health interventions and support evidence-based decision-making.
Key publications
- Lee YA, Higgins C, Procter P, Rushwan S, Anyakora C, Gülmezoglu A, Chinery L, Ozawa S. Modeling the economic impact of substandard uterotonics on maternal hemorrhage in Nigeria: Quality-assured oxytocin and misoprostol can contribute towards universal health coverage. BMJ Public Health. 2025.
- Lee YA, Higgins C, Procter P, Rushwan S, Gülmezoglu A, Chinery L, Ozawa S. Modeling the economic and health impact of substandard uterotonics in Senegal. BMC Pregnancy and Childbirth. 2025.
- Lee YA, Higgins C, Procter P, Rushwan S, Gülmezoglu A, Chinery L, Ozawa S. Quality-assured uterotonics can prevent hemorrhage and save mothers’ lives. ISPOR 2025, Montréal, QC, Canada. Poster presentation.
- Ngo PQ, Wu A, Lee YA, Ozawa S. Health and economic value of pneumococcal conjugate vaccine against antimicrobial resistance in Brazil: An agent-based simulation study. ISPOR 2025, Montréal, QC, Canada. Poster presentation.
- Higgins C, Lee YA, Chen HH, Ozawa S. Cost of vaccine misinformation on the U.S. healthcare system. ISPOR 2025, Montréal, QC, Canada. Poster presentation.
- Bautista K, Lee YA, Higgins C, Procter P, Rushwan S, Baidoo A, Issah K, Fofie C, Gülmezoglu A, Chinery L, Ozawa S. Modeling the economic burden of postpartum hemorrhage due to substandard uterotonics in Ghana. PLOS Global Public Health. 2024.
- Lee YA. Countering the wicked problem of poor-quality medicines: Modeling the economic and clinical impact of substandard and falsified drugs. ASTMH 2023, Chicago, IL, USA. Symposium presentation.
- Ozawa S, Schuh HB, Nakamura T, Yemeke TT, Lee YA, MacDonald NE. How to increase and maintain high immunization coverage: The Vaccination Demand Resilience (VDR) framework. Vaccine. 2023.
- Ozawa S, Chen HH, Lee YA, Higgins CR, Yemeke TT. Characterizing medicine quality by active pharmaceutical ingredient levels: A systematic review and meta-analysis across low- and middle-income countries. American Journal of Tropical Medicine and Hygiene. 2022.
Education
- Fellowship in Quality of Medical Products, U.S. Pharmacopeia & University of North Carolina at Chapel Hill, North Carolina, USA
- MHA in Health Policy and Management, University of North Carolina at Chapel Hill, North Carolina, USA
- BS in Pharmacy, Taipei Medical University, Taipei, Taiwan
My letter
In mathematics and science, Delta (Δ) signifies change – a symbol that reflects my commitment to driving meaningful progress in healthcare. Whether analyzing data, building models, or translating evidence into strategic insights, I focus on understanding change and its impact. Delta reminds me that even small differences can lead to important outcomes. It also reflects the mindset I bring to my work: curious, evidence-driven, and focused on creating measurable value.
