The 4th Joint Symposium on Immunology, titled "The 4th IFReC-IIT Symposium," was co-hosted in London on Friday, 20 June 2025, by the University of Osaka's Immunology Frontier Research Center (IFReC) and University College London (UCL), through UCL's Institute of Immunity & Transplantation (IIT).

Professor Hans Stauss and Professor Kiyoshi Takeda gave opening remarks. These were followed by lectures and discussions showcasing cutting-edge research in immunology. With approximately 100 attendees, the morning sessions featured oral presentations by six early-career researchers from each institution. In the afternoon, principal investigators from both institutions delivered nine talks, six from IFReC and three from IIT, stimulating vibrant discussion and the exchange of ideas. 

Early-career researchers from both IFReC and IIT also presented posters, engaging further with peers and principal investigators. These sessions facilitated in-depth exchanges and highlighted the young researchers' enthusiasm, as many gained significant inspiration from the interactions. 

IFReC and IIT continue to advance international collaborative research and foster exchanges among researchers and students in the field of immunology, and this symposium is expected to further strengthen their partnership in the years ahead.

This symposium was supported by the project "An international network for advanced research on human immunology," funded through the Core-to-Core Program of the Japan Society for the Promotion of Science (JSPS).