Yonsei Institute
for Global Health

1) Please introduce yourself. My name is George Isaya Okoth Orerah and I am 40 years old. I am married and a proud father of two children, a son and a daughter. I am a fellow of the American College of Surgeons (FACS), which reflects my deep commitment to surgical excellence. I am also a fellow of the College of Surgeons of East, Central and Southern Africa (COSECSA) and part of it’s faculty in the General Surgery Residency program in Machakos Kenya. My professional journey is driven by a passion for advancing surgical standards and mentoring the next generation of surgeons. 2) Where is your working place back in your country and what is your specialty? In my home country Kenya,I work as a General Surgeon at the Machakos County Referral Hospital, where I have dedicated over half a decade to clinical practice and teaching. My surgical expertise primarily focuses on endocrine surgeries (notably breast surgery), abdominal procedures and trauma management. Beyond my clinical responsibilities, I am deeply committed to surgical education and mentorship, striving to bridge the gap between complex medical theory and practical, life-saving interventions. My journey in medicine has been driven by a relentless desire to improve patient outcomes in resource-limited settings,and to advocate for equitable healthcare access. 3) How did you get to know Severance? Why did you choose Severance as your training hospital? After 5 years of immersion in the local medical landscape, I knew it was time time to advance my knowledge and skill in one of the sub-speciality of General Surgery. My decision of which subspeciality to pick, had already been biased from the numerous numbers of breast surgery cases that I was already doing at the local hospital level. I realized that to truly elevate the standard of care for my patients, I needed the rigorous,world-class training that only Severance Hospital could provide.Severance Hospital’s reputation for pioneering surgical techniques and its commitment to patient-centered innovation are unparalleled. My introduction to Severance Hospital came through internet searches of centers of excellence in breast oncology. The more I delved into the institution’s archives and clinical reports,the more I became convinced that this was the crucible where my professional aspirations would be forged. Through a friend and colleague, I also got to learn of the Avison International Fellowship (AIF) program, which further solidified my resolve. I did not hesitate to apply. 4) How long is your training period in Korea? The fellowship program spans one year,a duration meticulously structured to ensure comprehensive exposure to both advanced surgical methodologies and multidisciplinary clinical research. 5) Which area did you focus on during your fellowship at Severance? My primary focus has been on Breast Surgery: the integration of oncoplastic breast surgery, minimally invasive techniques notably robotic-assisted breast surgery. 6) What is the most impressive feature of Severance Hospital? The most impressive feature of Severance Hospital is its human resource component, where the profound synergy between seasoned expertise and relentless innovation breathes life into patient care.This unique environment fosters a culture of collaborative excellence,where every specialist, from surgeons to anaesthesiologists, oncologists, pathologists, radiologists, trainee fellows, residents, interns, students, nurses, researchers and others,work in seamless harmony to transcend traditional clinical boundaries. Everyone consults and the decision taken is a whole team’s decision and not merely an individual doctor’s decision. Furthermore, the hospital’s commitment to patient-centered values, ensures that advanced medical technology never overshadows the compassionate touch, but rather serves as a catalyst for healing. Technology at the Severance Hospital has been embraced fully with now over 50,000 robotic surgeries having been successfully performed, marking a milestone in precision and becoming the first in the world to achieve such a monumental feat in robotic-assisted surgeries. 7) What are the specific contents of your fellowship program at Severance? The fellowship program at the Severance Hospital is very deliberate especially to International Fellows. Cognisant of the fact that there may be need for integration into the local language, culture and hospital ethos, the first month is dedicated to the Severance International Fellowship Prime Course (SIF-PC). This intensive orientation includes basic korean language training, cultural immersion including a tour of Seoul’s historical, cultural and modern landmarks. It also includes medical professionalism and ethics, clinical research, statistics and methology sessions. Following this foundational base, the program ushers one into their respective departments, where the true rigor of clinical practice begins. Here,fellows are fully integrated into the surgical teams, with the focus on observing all that transpires within the operating theater, the wards and the outpatient clinics. This takes two months in total. Upon completion of this observership period, the fellows transition into a phase of hands-on clinical engagement program, which is carefully supervised by the esteemed faculty mentors. This is the meat of the fellowship, where theoretical knowledge converges with practical application. Participants are tasked with managing complex cases, refining their surgical techniques.and navigating the nuanced decision-making processes that define high-level medical care with evidence based research being at the centre of it. I am particularly grateful that I have come to learn robotic and endoscopic breast surgery from very talented mentors who have pushed me to transcend my previous limitations. 8) If you were to get the chance to come back, which field of clinical study would you like to focus on? Having done Robotic and endoscopic breast surgery, and witnessing the transformative potential of minimally invasive interventions, I would choose to delve deeper into this realm. I would consider robotic thyroid surgery as my next frontier, and seek to bridge the gap and become an Endocrine surgeon who seamlessly integrates these advanced techniques into routine practice.The precision afforded by robotic platforms not only enhances oncological outcomes but also significantly improves patient recovery and cosmetic outcomes, embodying the essence of "precision medicine" that transcends mere technical execution. 9) Who are you most thankful for at Severance(who helped you the most) & why? First and foremost, I am grateful to the Almighty God for availing this momentous opportunity in my life to have come to Severance hospital for this Fellowship training. Then the Avison International Fellowship through the Medical Mission Center for the sponsorship to have made this dream come true. At the pinnacle of this, I would like to appreciate Professor Chinyong Pak and Professor Paul Choi who believed in my potential and committed to availing this sponsorship to me. They have become friends and this has even transcended to our families. In the department of Breast Surgery, Professor Hyung Seok Park has played a pivotal role in my fellowship program. He has committedly seen me through the basics of minimally-invasive breast surgery and held my hand all the way to its advanced levels. This level of confidence is unparalleled and I can only imagine what lies ahead. Indeed, the old adage is still true, “If I have seen far, it is by standing on the shoulders of others”. My fellow colleagues of SIF-PC course, AIF and Talmidine church and fellows in the department of breast surgery have also made the transition and the journey in Korea a memorable one for which I will forever be grateful. 10) What was your first impression of Korea? I had mixed feeling about coming for a fellowship training in Korea - both excitement and indifference. Excitement because of the level of training that I was looking at was definitely one of the world’s best with all the expertise and the equipment that the best would go through. This I can confidently say that I have witnessed and my expectations have been exceeded. From the SIF-PC course to the observership, the dry lab sessions, the wet lab sessions and real hands on experience especially in robotics has been mind-blowing. The indifference was the fear of the unknown; the cultural differences that were glaring, the food, the language, the climatic differences were all new to me. I must say that these fears were slowly alleviated by the community that surrounded me and helped me settle in well and in a smooth manner. 11) What is the best memory so far during your stay here? It would be unfair to single out one memory over the many that have stood out and I will forever cherish in my heart. During my stay so far, my family visited me and together we toured several places in Korea including Busan, Jeju island and of course Seoul where I am based. This was all but blissful. From the cultural villages, to the high rise Seoul Sky tower, relaxing parks and informative museums, waterfalls and mountain hikes, the sea-side breeze of Busan and Jeju island, the wonderous bridges and road and rail tunnels that make travels quite smooth and fast to the indoor pools of Jeju’s pension houses. This alongside other ventures in and around Seoul have made my training and fellowship really memorable.

Beyond Being a Generalist: Becoming a Specialist in Global Health A Masterclass with Hyundai Motor Chung Mong-Koo Foundation Scholars The COVID-19 pandemic, along with other global health crises, has provided valuable lessons on responding to infectious diseases. Yet despite these experiences, many developing countries continue to face significant challenges in building effective and resilient public health systems. To explore the future of global health and international cooperation, we sat down with Professor Han Whiejong Matthew of the Yonsei University Graduate School of Public Health. An expert in global health security and Official Development Assistance (ODA), Professor Han shared his perspectives on cross-border infectious disease threats, strengthening healthcare systems in developing countries, and preparing the next generation of global health professionals. Participating Scholars Park Soyoung Nurse, Seoul National University Hospital Incoming Master of Public Health Student Seo Eunjin Undergraduate Student Department of Animal Life Resources and Health Busan National University About Professor Han Whiejong Matthew Professor Han Whiejong Matthew is a recognized expert in global health security who has dedicated his career to strengthening healthcare systems in developing countries and cultivating future leaders in international health. He currently leads the Global Health and Infectious Disease Response programs at the Yonsei University Graduate School of Public Health. He also serves as Vice Director of the Center for Global Development at the Yonsei Institute for Global Health, Yonsei University Health System. Interview It was 7:00 p.m. on a warm evening in May. Even after several consecutive days of temperatures exceeding 30°C, Professor Han Whiejong Matthew met with two Hyundai Motor Chung Mong-Koo Foundation scholars in the library of the Yonsei University Graduate School of Public Health, located within Severance Hospital in Sinchon, Seoul. One scholar had just finished a demanding shift as a nurse, while the other had traveled from Busan by KTX for the interview. Their commitment to learning was evident from the moment they arrived. In the quiet library, the conversation unfolded with genuine curiosity, thoughtful questions, and candid reflections. Both the scholars and Professor Han approached the discussion with remarkable sincerity, united by a shared passion for global health and the future of international healthcare cooperation. Scholar Park Soyoung The COVID-19 pandemic made many people realize the importance of infectious disease preparedness. In your opinion, what is the single most important change that should take place in public health education in the post-pandemic era? Professor Han Whiejong Matthew The COVID-19 pandemic left profound lessons—not only for individuals, but also for societies and governments around the world. As many experts continue to warn, another pandemic, often referred to as Disease X, is not a matter of if, but when. The real question is how we prepare for it. Just as healthcare is increasingly shifting its focus from treatment to prevention, public health education must also evolve. Rather than relying on centralized, lecture-based instruction, it should emphasize practical, community-based education that teaches people how to prevent and respond to infectious diseases step by step. In many developing countries, local community leaders and religious leaders often have greater influence than government authorities. By strengthening their capacity, communities themselves can become the first line of defense against future outbreaks. Another area attracting significant attention is digital health and artificial intelligence. AI is already helping identify disease patterns that were previously difficult to detect, while enabling earlier detection and more accurate prediction of transmission routes. Scholar Seo Eunjin You have participated in projects to strengthen infectious disease response systems in developing countries. Looking back, what was the greatest challenge you faced? Professor Han Whiejong Matthew Two years ago, I participated in a project to develop a national master plan for infectious disease preparedness and response in Tajikistan. When I arrived, I quickly realized that the challenge extended far beyond shortages of hospitals or medical personnel. What concerned me even more was the absence of a solid institutional framework. Essential elements—including infectious disease legislation, quarantine regulations, reporting systems, and emergency response procedures—were either incomplete or entirely lacking. In Korea, our infectious disease response system was significantly strengthened after the MERS outbreak, which led to improvements in legal classifications and national response mechanisms. Many developing countries, however, are still trying to build those institutional foundations while simultaneously responding to rapidly spreading outbreaks. Perhaps the greatest challenge was the lack of trust between governments and the public. In many cases, citizens were reluctant to follow public health guidance, while policymakers hesitated to take decisive action because they doubted whether the public would cooperate. It often left me wondering where meaningful change should begin. Another lesson that should never be overlooked is the importance of transparency. During the COVID-19 pandemic, the Korean government held daily press briefings through the Central Disaster and Safety Countermeasures Headquarters. Those briefings played a critical role in reducing public anxiety and maintaining trust. Without transparent communication, misinformation—or what we now call an infodemic—spreads rapidly. In many developing countries, delays in releasing reliable information allowed fear and rumors to spread faster than official guidance, ultimately slowing the overall response to the pandemic. Scholar Park Soyoung As a nurse working in an operating room, where maintaining a sterile environment is a fundamental principle, I have always believed that infectious disease response is primarily the responsibility of healthcare professionals. Beyond medical personnel, who else should play a role in preparing for future infectious disease crises? Professor Han Whiejong Matthew Responding to infectious diseases requires the participation of society as a whole. Researchers must continue advancing scientific knowledge, while IT specialists and data scientists play a vital role in collecting, analyzing, and interpreting data to predict future outbreaks. Governments, meanwhile, must strengthen legal and institutional frameworks—particularly in developing countries where many systems remain underdeveloped—and ensure that effective public health and quarantine systems are firmly in place. Above all, one of the greatest threats during an outbreak is not the disease itself, but the infodemic that accompanies it. Transparent communication is essential for reducing uncertainty and building public trust. When governments communicate openly and consistently, people are more likely to trust public health recommendations and willingly participate in disease control efforts. My experience in countries such as Tajikistan has shown that even excellent medical infrastructure alone is not enough. Without effective laws, reliable data, transparent communication, and public trust, it is impossible to keep pace with the spread of infectious diseases. Ultimately, overcoming future pandemics requires a coordinated effort involving healthcare professionals, policymakers, researchers, IT experts, the media, and the public. Only when every part of society works together can we build a truly resilient public health system. Scholar Park Soyoung Responses to infectious disease outbreaks often vary depending on the mode of transmission, whether waterborne, airborne, or otherwise. In the face of different infectious disease threats, what practical advice would you give the public on how to respond appropriately? Professor Han Whiejong Matthew From a public health perspective, the most fundamental principle is that the public should trust and follow the guidance of health experts. Most people are not expected to possess specialized knowledge about infectious diseases, which makes clear, evidence-based communication from experts all the more important. Take COVID-19, for example. We learned that airborne transmission can spread infection rapidly. More recently, media reports on hantavirus have highlighted cases in which people with no direct physical contact were infected because the virus was transmitted through the air. These examples remind us that infectious diseases often spread in ways that are not immediately visible. That is why our mindset must change. Instead of thinking, "As long as I'm careful, I'll be fine," we need to recognize that our actions also affect the health and safety of those around us. Mask-wearing during the COVID-19 pandemic is another good example. In many European and North American countries, wearing a mask was often associated with being infected, leading many people to avoid masks altogether. Cultural perceptions such as these contributed to differences in how countries responded to the pandemic. For this reason, government recommendations alone are not enough. Medical institutions, schools, and local communities must continuously educate the public and explain not only what preventive measures are recommended, but why they matter. When people understand the reasoning behind public health guidance, they are far more likely to follow it. Scholar Seo Eunjin The One Health approach—which recognizes the close connection between humans, animals, and the environment—has become an important topic in global health discussions. In your opinion, what are the biggest challenges preventing this approach from being fully translated into public policy? Professor Han Whiejong Matthew This is a challenge that many countries are facing today. An increasing number of emerging infectious diseases originate in animals. Human health, animal health, environmental conditions, and even food systems are closely interconnected under the One Health framework. Ultimately, they all influence human health. The challenge, however, is that the institutions responsible for these areas often operate independently. In Korea, for example, human health falls under the Ministry of Health and Welfare, environmental issues are managed by the Ministry of Environment, and animal diseases are overseen by the Ministry of Agriculture, Food and Rural Affairs. Because responsibilities are divided among different ministries, coordinating a unified response can be difficult. In my view, one of the greatest barriers is the absence of a strong cross-governmental coordinating body capable of bringing these sectors together. The same challenge exists in academia. I frequently collaborate with veterinarians, food scientists, environmental experts, and government officials on research projects. While everyone recognizes the importance of interdisciplinary collaboration, each field has its own priorities, schedules, and institutional interests. These differences often make collaborative research more challenging than people expect. Nevertheless, overcoming these barriers is essential if we hope to build a truly effective One Health system in the future. Scholar Seo Eunjin I hope to work for an international organization such as the World Health Organization in the future. What experiences would you recommend that students gain in Korea to prepare for such a career? Professor Han Whiejong Matthew Han Many young people dream of working for international organizations, and that is certainly encouraging. The first thing I always emphasize is that international organizations are generally looking for specialists rather than generalists. Broad knowledge is valuable, but what they truly need are professionals with deep expertise in a specific field. For those interested in global health, I strongly recommend earning at least a Master of Public Health (MPH) degree. Equally important is gaining practical experience. Whether through internships, research projects, or fieldwork, students should actively seek opportunities to develop expertise in an area they are genuinely passionate about. At Yonsei University Health System, for example, we regularly host KOICA Young Professional (YP) interns. Many students want to experience a wide variety of projects, but I often encourage them to focus on one area of interest and immerse themselves in it. Sometimes that even means approaching a professor directly and asking to participate in a project that aligns with their interests. Another piece of advice I always give is never to underestimate the value of networking. Wherever you work in the world, the relationships you build will become one of your greatest professional assets. Rather than worrying about not having a network, create one by participating in internships, research projects, conferences, and collaborative activities. Those experiences naturally lead to meaningful professional connections that can shape your future career. Scholar Park Soyoung I will soon begin a Master of Public Health program overseas. As I prepare for graduate school, what would you recommend I focus on to build a strong professional network? Professor Han Whiejong Matthew One of the most important aspects of graduate school—whether you're writing a thesis or participating in research projects—is building a strong relationship with your academic advisor. My advice is to identify your area of interest as early as possible and find a faculty advisor who shares those interests. Don't wait until it's time to begin your thesis. As soon as you discover a topic that genuinely excites you, reach out to the professor, discuss your interests, and seek their guidance. From a professor's perspective, proactive students naturally stand out. The trust, mentorship, and professional network you build with your advisor will become one of the most valuable assets you gain during your graduate studies. I also encourage students to participate in research competitions, collaborative projects, and other academic opportunities offered by universities and graduate schools. Working alongside peers from different countries provides invaluable opportunities to learn from one another, broaden your perspective, and grow both academically and professionally. Scholar Park Soyoung In recent years, global ODA budgets have been declining in many countries. Why do you believe it is still essential to continue investing in international development assistance despite these challenges? Professor Han Whiejong Matthew As many people know, Korea's remarkable economic development was made possible in part through support from the international community—including assistance from the United States and development loans from Japan. Institutions such as KIST, the Gyeongbu Expressway, and POSCO all benefited from international cooperation during Korea's early stages of development. Having grown with the support of others, I believe Korea now has a responsibility to give back. ODA is more than humanitarian assistance. It also creates opportunities for long-term partnerships and serves as a bridge for Korean institutions and companies to expand their global engagement. For that reason, I believe ODA should continue to grow rather than decline. Although overall ODA budgets have recently become tighter, one encouraging trend is that investment in education and capacity-building continues to increase. Throughout my career, I have participated in several hospital construction projects. Yet I have often returned two or three years later only to find that newly built hospitals were not functioning as originally intended. This experience taught me an important lesson: the true success of ODA lies in sustainability. And the most effective way to achieve sustainability is through education and training. Infrastructure can be built relatively quickly, but lasting self-reliance is only possible when local professionals develop the knowledge, skills, and capacity to operate and sustain those systems independently. Scholar Seo Eunjin Looking back on your career in both Korea and abroad, is there a particular moment or achievement that has been especially meaningful to you? Professor Han Whiejong Matthew One of the most rewarding aspects of my work is seeing our graduates succeed and make meaningful contributions in their respective countries. For many years, our department has operated degree programs for international students, and I still keep in touch with many of those graduates today. It is incredibly fulfilling when they share their accomplishments with me—whether it's producing a public health campaign video, launching a new project, or training hundreds of healthcare professionals using the knowledge they gained in Korea. Twice a year, we also organize virtual alumni seminars that bring together graduates from around the world. Seeing more than a hundred alumni gather to exchange experiences, discuss both successes and challenges, and continue supporting one another always reminds me why education is one of the most meaningful investments we can make. Scholar Park Soyoung As more students become interested in global health and infectious disease preparedness, what advice would you most like to give the next generation of professionals? Professor Han Whiejong Matthew As I mentioned earlier, the key is developing expertise. Even within infectious disease response, there are many specialized areas—from prevention and surveillance to diagnosis, emergency response, and spillover monitoring. While it is important to understand the broader picture, you should strive to become an expert in the field that genuinely interests you. Equally important is networking. If you study abroad, every friendship you build becomes part of your professional network. I encourage students to actively participate in team projects, collaborate with people from diverse backgrounds, and create opportunities to learn from one another. Those relationships will continue to support your career long after graduation. Closing Remarks As Professor Han Whiejong Matthew emphasized throughout the conversation, cultivating highly skilled professionals has become a shared priority for countries around the world. In support of that goal, the Hyundai Motor Chung Mong-Koo Foundation continues to invest in global ODA initiatives that strengthen healthcare systems and advance global health security. In the face of unpredictable infectious disease threats, the most powerful resource is—and always will be—people. Mini Interview Professor Han Whiejong Matthew Seeing so many young people passionately pursuing careers in global health and infectious disease preparedness gives me great hope. I believe they will become the next generation of experts who will help shape a healthier and more resilient world. Scholar Park Soyoung Speaking with Professor Han just before beginning my Master's program was an invaluable experience. Beyond gaining professional knowledge, I learned the importance of being proactive in shaping my own career. I sincerely appreciate his thoughtful advice and encouragement. Scholar Seo Eunjin I have long dreamed of working for an international organization such as the World Health Organization. Professor Han's advice about developing true expertise gave me a much clearer direction for pursuing that goal. I am deeply grateful for his valuable insights.

1) Please introduce yourself. My name is May David, I recently turned 40 this month. I am the youngest of 4 all girl siblings. 2) Where is your working place back in your country and what is your specialty? I am a Gynecologic Oncologist, based in Manila, Philippines. 3) How did you get to know Severance? Why did you choose Severance as your training hospital? I first heard about Severance Hospital as the affiliate institution of the Yonsei University Health Services through a couple of Filipino colleagues who also trained in the hospital before the pandemic. I chose Severance Hospital because it is one of the world’s leading centers in terms of performing minimally invasive gynecologic cancer surgery, especially robotic surgery. 4) How long is your training period in Korea? One year 5) Which area did you focus on during your fellowship at Severance? I am doing clinical fellowship in Gynecologic Oncology with special focus on minimally invasive gynecologic surgery. 6) What is the most impressive feature of Severance Hospital? It is very difficult to choose just one aspect of the hospital that impresses me the most because there are honestly so many – from the sheer size of the hospital complex with dedicated buildings for Cardiology, Pediatrics, and Dentistry, to name a few, to the efficiency, convenience, and cutting edge technology that are apparent in how the entire hospital operates. But if I really had to pick one, the most remarkable to me is the Yonsei Cancer Center. As an oncologist, it has everything (and more) that one could possibly need to provide world-class care. Here, patients have access to highly-skilled and competent surgeons who are able to perform advanced cancer surgery, with Severance Hospital being recently recognized as the first hospital in the world to perform 50,000 robotic-assisted procedures. The center also offers precision radiotherapy and ease of access to the latest chemotherapeutic drugs and targeted therapy, including investigational drugs through its active participation in many clinical trials. All of these things I hope one day will also be a reality for my countrymen in the Philippines. 7) What are the specific contents of your fellowship program at Severance? The main focus of my training being minimally invasive gynecologic surgery, I am mostly involved in assisting and performing laparoscopic and robotic surgery in both benign and malignant conditions. Additionally, I have had numerous exposure to advanced pelvic and upper abdominal surgeries that I did not see often in my country. Lastly, I have had the privilege of observing how clinical trials are conducted and ran. 8) If you were to get the chance to come back, which field of clinical study would you like to focus on? I would like to pursue the field of molecular oncology and learn more about conducting and participating in clinical trials. 9) Who are you most thankful for at Severance(who helped you the most) & why? I am most thankful first and foremost to my mentor, Professor Jung Yun Lee. He has been so generous and patient with imparting his skills and knowledge, while at the same time remaining humble. For the past 8 months, I have learned a great deal from him as a proficient surgeon and prolific researcher, and most importantly, an inspiring and encouraging mentor. He has helped open doors for me not only here in South Korea but also in international settings. I would also like to acknowledge the help of the administrative staff for international fellows (Mr. Park and co) for all their help and guidance from the preparations to coming here and even up to now. Last but not the least, I am grateful for my SIF batchmates with whom I started this journey last September and who made the transition of living in a foreign country easier. 10) What was your first impression of Korea? My first impression of Korea was that it is a first-world country that has a good balance of modern and traditional elements. It boasts of impressive skyscrapers and buildings, juxtaposed with historical palaces and traditional neighborhoods. Everything is organized and efficient – from its transportation and health care systems to the most mundane day to day experiences. 11) What is the best memory so far during your stay here? My personal best memory so far during my stay here has been going for a run and exploring the city in different seasons. Having come from a tropical country where it is either sunny or rainy, experiencing the transition from summer to the beautiful colors of autumn last year was breathtaking. I was similarly awestruck at the beginning of spring a few weeks ago when many parts of Seoul were lined by a sea of thick and vibrant pink and white blooms. It was nature at its most glorious.