Wilhelm Foundation has currently organized nine world congresses for undiagnosed diseases "International Conferences on Rare and Undiagnosed Diseases" in collaboration with Dr. Gahl and the host country's doctors. The most recent Conference was the 11th Conference, taking place on November 07-08, 2022, in Vienna, Austria hosted by the Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases together with the Medical University of Vienna.
Congress's primary goal is to spread awareness of the Undiagnosed Diseases Program (UDP) and Undiagnosed Diseases Network International (UDNI) to get more specialists to help solve the undiagnosed diseases. Another very important feature of the congresses is that the specialists address one of their unresolved diseases and ask the participants for help in solving the mystery, which is the Wilhelm Foundation's intention with the World Congresses.







