The 4th International Conference on Rare Diseases and Orphan Drugs, set to take place on October 22-23, 2026, at Hotel Best Front Maritim, Barcelona, Spain. This two-day conference serves as a global platform for researchers, clinicians, and industry experts to discuss recent advancements, challenges, and opportunities in the field of rare diseases and orphan drugs The primary objective of Rare Diseases 2026 is to raise awareness, foster collaboration, and accelerate progress in addressing the complex needs of individuals affected by rare diseases. The conference will facilitate dialogue and knowledge exchange among diverse stakeholders involved in rare disease research, drug development, patient care, advocacy, and policy-making.