Welcome to the MDAH 2026 website!

Join us at the University of Namur in Belgium for the 15th International Symposium on Marek’s Disease and Avian Herpesviruses, from June 29 to July 2, 2025. Connect with leading experts in the vibrant city of Namur, at the heart of Europe.

Every two years, the International Symposium on Marek's Disease and Avian Herpesviruses (MDAH) brings together researchers from around the world to exchange the latest insights on poultry viral diseases — covering their biology, evolution, control strategies, and epidemiology. Attendees include PhD students, postdocs and researchers representing academia, government, and commercial organizations from North and South America, Europe, Asia, the Middle East, Australia, and Africa.