ExpreS2ion Reports First Immunogenicity Data from HER2 Breast Cancer Vaccine ES2B-C001 Phase I Trial
Hørsholm, Denmark, 4 September 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 the first immunogenicity results from its ongoing Phase I clinical trial evaluating ES2B-C001, a novel HER2-targeted therapeutic breast cancer vaccine. The data, derived from the first patient enrolled in the trial, indicate that the vaccine is triggering a significant immune response.Early Evidence of Immune Activation The