ExpreS2ion Reports Updated Immunogenicity Data from First Three Patients and DSMB Recommendation to Progress ES2B-C001 Phase I Trial to Next Dose Cohort
Hørsholm, Denmark, 19 December 2025 – ExpreS2ion Biotech Holding AB’s affiliate ExpreS2ion Biotechnologies ApS (“ExpreS2ion"), a clinical-stage biotechnology company with a focused pipeline of vaccine candidates targeting infectious diseases and cancer, today reports (i) updated immunogenicity results from the first three patients enrolled in its ongoing Phase I clinical trial of ES2B-C001, a novel HER2-targeted therapeutic breast cancer vaccine, and (ii) that the independent Data Safety Monitoring Board (DSMB) has reviewed safety data from the first cohort and recommended progression to the