After a successful implementation of our new scientifically orientated Symposium “Mucosal Immunology”, we are happy to welcome you to our Symposium 241 which will take place in the Examination Schools of Oxford University from July 10 to 12, 2025. We are happy to have Prof. Dr. Britta Siegmund from Charité Berlin, Prof. Ailsa Hart from London, Dr. James Lee from London and Dr. Oliver Brain from Oxford as scientific organizers and medical experts and already thank them for developing the scientific program. This Symposium focuses on selected abstracts that will be presented and awarded in two poster pitches sessions.