World Orphan Drug Congress 2026 will be held from 26th - 28th October 2026 at RAI Congress Centre in Amsterdam, Netherlands The. This is the largest and most established orphan drugs & rare diseases meeting of its kind across the globe. It is an opportunity to learn from leading experts, network with colleagues, and share ideas on how to advance the development and access to life-saving treatments for rare diseases. It brings together leading experts from across the globe to discuss the latest advancements in research, development, and access to orphan drugs.