Current Fellows

Jason Chen, MD, MPH

Dr. Chen grew up in Buffalo, NY, and Salt Lake City, UT to Taiwanese parents. He holds an MD/MPH from the University of Utah School of Medicine. After studying Spanish, Biology, and International Relations at the University of Utah, he was a Fulbright English Teaching Assistant in Oxolotán, Tabasco, México. His experiences in rural México motivated him to serve the largely migrant farmworker community of Salinas, CA during his Family Medicine Residency at Natividad, where he was awarded the Hannon-Lauderdale-Rumbel-Santell Memorial Award for outstanding performance in 2024.

As a 2024-2025 UCSF-Contra Costa Global Health Fellow, he is excited to teach POCUS courses in the Bay Area, as well as in Peru and Malawi. He looks forward to using his Advanced Spanish and Mandarin skills to help his patients. He is eager to gain a deeper appreciation of different immigrant experiences, reconnect with family in Oakland, and learn more about his Asian-American heritage. In his free time, he enjoys playing ukulele, board games, and improving his language skills.

Nina Clark, DO

Nina is a recent graduate of the University of Illinois Chicago Family Medicine program. A lifelong Chicagoan, she grew up with a commitment to social justice and a desire to work in underserved areas. Her interest in medicine started after seeing an exhibit by Doctors Without Borders, and it was then that she committed to global health. Her fluency in Spanish led her to study Latin American studies and travel extensively. She then attended Midwestern University for medical school. Her first global health experiences were with Medical Brigades in Honduras. During residency, she developed an interest in reproductive health, hospital medicine and ultrasound. She is excited to continue to develop these skills, especially ultrasound knowledge, through global health experiences in the Contra Costa fellowship. In her free time, she can usually be found exploring new restaurants, reading or traveling.

Yvonne Kamua, MD/MBA

Yvonne holds a joint MD/MBA degree from the University of Kansas School of Medicine and is a recent graduate from Ascension St. Vincent's Family Medicine Residency with specialized focus on Obstetrics/Gynecology with an emphasis on global maternal and child health. Prior to starting residency, she spent a year as a global health research assistant as part of a joint collaboration between Kenya Medical Research Institute (KEMRI), the University of Kansas School of Medicine, and Global Health Innovations (GHI). In this role, she worked with HIV-positive pregnant women and their sera-exposed infants, alongside their healthcare providers, on various mobile technology projects surrounding Prevention of Mother to Child Transmission (PMTCT), with the goal of further expediting diagnosis and initiation of treatment. As a resident physician, she remained committed to global health work and spent part of her time working at Gynocare Women's and Fistula Hospital in Eldoret, Kenya. While there, she identified a gap and potential opportunity for cross-continental collaboration between her residency program and the Fistula Hospital and pioneered a leadership project centered about creating an equitable, reciprocal, North-South, twinning partnership based on the World Health Organization's Twinning Partnerships Framework for Improvement. Her project has garnered attention at the national level and recently received a best leadership project award from the AAFP Foundation's Emerging Leader Institute.

She is eager to join the Contra Costa family with hopes to master core ultrasound skills, achieve board certification in tropical medicine and continue her global health growth journey. During her fellowship, she will continue building the global health partnership she started while in residency while also working at Gynocare in Eldoret, Kenya. She also looks forward to working in Malawi. In her free time, she enjoys spending time with her family, having deep conversations with practically anyone, listening to audio books, attending concerts and playing guitar.

Rebecca Lee, MD

Rebecca Lee is a passionate physician with a background in community-based, integrated primary care. She completed her residency at Hunterdon Family Medicine Residency in 2017, where she cultivated her commitment to providing equitable healthcare to diverse populations. She then served as a staff physician and Medical Director at an FQHC in the Bronx (Community Healthcare Network- Tremont) for the past 7 years, practicing primary care, refugee health,transgender care, women's health, addiction medicine, and HIV care. She served on the NYC AHA Medical Advisory Committee and was involved with community partnerships. Throughout her education and career, Dr. Lee has garnered experience in various primary care settings, in NYC, Gambia, UK, Central America, Uganda, and Peru. These experiences have enriched her understanding of global health challenges and reinforced her dedication to serving underserved communities. Dr. Lee will be relocating from the Bronx, NY to Oakland,CA with her husband and two toddlers to begin the Contra Costa/UCSF Global Health Fellowship. She is eager to apply her skills and experiences in new contexts and to further develop her training in global health

Darlene Olurin, MD

Darlene Olurin was born in Elizabeth City, NC, and grew up in Ibadan, Nigeria. She earned her Bachelor of Science in Microbiology from Bowen University, Nigeria, and completed her Doctor of Medicine degree at the American University of Antigua. Her strong commitment to serving underserved communities has been a consistent theme throughout her career.

During her Family Medicine residency at Atrium Health Navicent, where she served as Chief Resident, Darlene pioneered a global health path by being the first resident from her program to travel to Jamaica for an elective rotation. She also participated in community projects to improve healthcare access for the uninsured, creating her own global health track.

She is excited to continue her passion as a fellow at Contra Costa/UCSF, aiming to gain experience in international healthcare, education, POCUS and becoming a more well-rounded physician.

In her free time, Darlene enjoys traveling, trying out new foods, shopping, hiking and spending quality time with her loved ones.