The Friedrich Loeffler Institute – Institute of International Animal Health / One Health (FLI-IAH) is a German federal research institute focused on global animal health and the One Health approach, which integrates human, animal, and environmental health. Its original German name is Friedrich-Loeffler-Institut, Institut für Internationale Tiergesundheit / One Health. The institute conducts research on transboundary and emerging infectious diseases, zoonoses, and international animal health policies, providing scientific guidance to improve global health security and sustainable livestock management.