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 at Mayo Clinic,Rochester, Minnesota in April 2021 and was virtual due to COVID-19.
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.
Wilhelm Foundation's 8th World Congress in Nijmegen, Netherlands in collaboration with Dr. Gahl, NIH UDP USA and Prof. van Zelst-Stams UDP Nijmegen Netherlands.
Wilhelm Foundation's 7th World Congress in New Delhi, India in collaboration with Dr. Gahl, NIH UDP USA and Prof. Puri UDP New Delhi India.
Wilhelm Foundation's 6th World Congress in Pozzouli Italy, in collaboration with Dr. Gahl, NIH UDP USA and Prof. Nigro, Pozzouli Italy.
Wilhelm Foundation's 5th World Congress in Stockholm in collaboration with Dr. Gahl, NIH UDP USA and Prof. Nordgren Karolinska-UDP Stockholm Sweden.
Wilhelm Foundation's 4th World Congress in Tokyo Japan, in collaboration with Dr. Gahl, NIH UDP USA and Prof. Kosaki UDP Tokyo Japan.
Wilhelm Foundation's 3rd World Congress in Vienna Austria, in collaboration with Dr. Gahl, NIH UDP USA and Prof. Kaan, UDP CeMM Vienna Austria.
Wilhelm Foundation's 2nd World Congress in Budapest Hungary, in collaboration with Dr. Gahl, NIH UDP USA and Dr. Melegh UDP Budapest Hungary.
Wilhelm Foundation's 1st World Congress in Rome Italy, in collaboration with Dr. Gahl, NIH UDP USA and Dr. Taruscio ISS Rome Italy.
