The National Institutes of Health (NIH), through the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), has announced a funding opportunity for research focused on developing cellular models of HIV pathogenesis. This initiative aims to enhance understanding of HIV interactions with human tissues by utilizing innovative three-dimensional models, such as organoids and microphysiological systems, to investigate mechanisms of viral persistence and associated co-occurring conditions. The funding opportunity allows for a budget of up to $500,000 annually, with a total commitment of $3 million for the fiscal year 2026, and applications are due by March 20, 2025. Interested applicants can find more information and submit inquiries via email at grantsinfo@nih.gov or visit the official announcement at https://grants.nih.gov/grants/guide/rfa-files/RFA-DK-25-021.html.