Workshop Flash Report – Immunotoxicity assessment: Addressing challenges and advancing methodologies

In a Nutshell

The ECETOC Workshop on Immunotoxicity Assessment was held in Brussels on July 9–10, 2025, to review the current regulatory landscape, discuss practical endpoint implementation (e.g., OECD 407, 408, 422, 443), explore novel in vitro methodologies, and identify gaps and opportunities for future guidance. ECETOC will continue the work presented at this workshop through the establishment of a new Immunotoxicity Assessment Task Force, with the main outcome being a peer-reviewed publication summarizing workshop and task force findings.