International Union of Immunological Societies

The International Union of Immunological Societies (IUIS), a member of the International Council for Science, is an organization which serves as an umbrella organization for many national and regionally grouped immunological societies. The organization was founded in 1969. The ten founding member societies were the American Association of Immunologists, British Society for Immunology, Canadian Society for Immunology, Dutch Society for Immunology, Gesellschaft fur Immunologie, Israel Immunological Society, Polish Society of Immunology, Scandinavian Society for Immunology, Societe Francaise d'immunologie, and Yugoslav Immunological Society. IUIS had 84 member societies in 2024.

The 2022–2025 executive committee of the IUIS is Miriam Merad, President; Rita Carsetti, Vice-President; João P. B. Viola, Secretary General; Michael Ratcliffe, Treasurer; Faith Osier, Past President.

Every three years the IUIS organizes an international congress, called the International Congress of Immunology (ICI), with one of its national society members. The ICI congress (rebranded as IUIS2019) took place in Beijing, China, in 2019. IUIS2023 was held in Cape Town, South Africa. Vienna, Austria will host IUIS2025.

Frontiers in Immunology is the IUIS' official journal.

The standing committees of the IUIS are Clinical Immunology, Early Career, Education, Gender Equity, Inborn Errors of Immunity, Immunotherapy, Nomenclature, Publications, Quality Assessment and Standardization, Vaccines, and Veterinary.

Among their activities is classification of primary immunodeficiency diseases.