Transmission dynamics
Estimation of reproduction number, serial interval, superspreading, and outbreak parameters across respiratory and emerging infections.
Onehealth Lab
Infectious disease transmission and public health response.
Onehealth Lab studies how infections spread, how surveillance systems perform, and how epidemiologic evidence can support public health decisions.
Research group led by Sukhyun Ryu at the Catholic University of Korea College of Medicine.
- Transmission dynamics
- Sentinel surveillance
- Forecasting
- Field epidemiology
Onehealth Lab is a research group led by Sukhyun Ryu at the Catholic University of Korea College of Medicine. We study infectious disease transmission, surveillance, and control, with an emphasis on questions that inform public health practice.
Current work spans respiratory and emerging infectious diseases, epidemic forecasting, sentinel and digital surveillance, and training for field epidemiology and public health response.
Onehealth Lab group photo
Lab
Summer School on Epidemics 2025
Invited lecture
Research community and academic exchange
The lab combines quantitative epidemiology with training, invited lectures, and collaborative exchange across institutions.
Summer School on Epidemics 2025
Summer School on Epidemics 2025
Training activities support field epidemiology education and practical exchange in infectious disease methods.
Invited lecture
Invited lectures and visiting speakers
Invited lectures bring researchers and public health practitioners into ongoing discussion with the lab.
Research
Current lines of work
Our work combines epidemiologic analysis, modelling, surveillance evaluation, and public health applications.
Surveillance systems
Evaluation and design of sentinel and digital surveillance systems for infectious disease monitoring and response.
Forecasting
Influenza nowcasting and forecasting, with recent work on machine learning approaches and epidemic prediction.
Public health practice
Teaching, outreach, and field epidemiology resources that connect quantitative work to implementation.
Projects
Selected ongoing and recent projects
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Machine learning based influenza epidemic model for nowcasting and forecasting
Principal Investigator -
Development of real-time epidemiological investigation response technology based on digital surveillance
Co-Principal Investigator -
Development of the standard textbook for Korea Field Epidemiology Training Program
Co-Investigator (PI: Byungchul Chun, Korea University)
Publications
Selected publications
Featured papers are shown with compact figure-style cards that summarize the study question and epidemiologic signal.
Emerging Infectious Diseases · 2025
Transmission dynamics and parameters for pertussis during a school-based outbreak in South Korea, 2024.
Cho UJ et al. School-based transmission and outbreak parameter estimation.
Influenza and Other Respiratory Viruses · 2025
Seroprevalence trends of antibodies to SARS-CoV-2 in South Korea, 2021–2022: a repeated cross-sectional study.
Kim AR et al. Repeated cross-sectional seroprevalence patterns across South Korea.
Journal of Infectious Diseases · 2020
Effects of school holidays on seasonal influenza in South Korea, 2014-2016.
Ryu S, Ali ST, Cowling BJ, Lau EHY. Timing, school calendars, and influenza seasonality.
People
Current members
Current members are listed below. Alumni and previous student interns are available on the people page.
Recent lectures and seminars
- 17 October 2025. Status of infectious diseases in Uganda by Dr. Freda Aceng, Ministry of Health, Uganda.
- 24 June 2025. Modelling and data analysis; HFMD epidemic and control by Dr. Yongdam Jeong and Dr. Sieun Lee, Pusan National University, Korea.
- 2 June 2025. Epidemic prediction: modelling and its application by Dr. Sung-mok Jung, University of North Carolina at Chapel Hill, U.S.
- 13 May 2025. Addressing antimicrobial resistance through One Health by Prof. Creuza Rachel Vicente, Universidade Federal do Espírito Santo, Vitória, Brazil.
Recent updates
- (Nov 30–Dec 3, 2025) Lea, Chiara, and Sukhyun presented at Epidemics 10 in San Diego, U.S.
- (Dec 1, 2025) Sukhyun started to serve as Board of Director at the Korean Society of Infectious Diseases.
- (September–October, 2025) Chiara and Sukhyun lectured in infectious disease epidemiology and surveillance and its application at the Dr. Lee Jong-Wook Fellowship program in Seoul.
- (September 3–4, 2025) Sukhyun lectured in the writing course for the 2025 Infectious Disease Surveillance Analysis Report.
- (September 2, 2025) Seonghui honored with the Excellent Student Research Award at The Catholic University of Korea.
Join
Opportunities
We welcome inquiries from prospective PhD students, postdoctoral researchers, and research assistants with interests in infectious disease epidemiology, modelling, surveillance, and public health practice. Please send a CV and a brief note on your research interests to gentryu@onehealth.or.kr.