Consortia Building Build interdisciplinary consortia that combine complementary expertise to create competitive, collaborative research teams. Vienna's ME/CFS research community is smaller than other medical research communities, but this creates unique opportunities for collaboration and form synergies between groups to form a critical mass. The previous WWTF  ME/CFS 2024 - Understanding ME/CFS call successfully funded seven projects by combining established researchers with newcomers to the field - demonstrating first synergies across different fields. WWTF welcomes cosortia who build upon these synergies, if possible. For this call, we strongly encourage: Interdisciplinary consortia that leverage complementary expertise across different research areas International collaboration by including researchers and groups from other countries who bring essential skills or resources Community building by welcoming new researchers and research groups who want to contribute to ME/CFS research, but may have not been involved in this field yet