The National Institutes of Health (NIH) has announced a funding opportunity titled "Clinical Trial Readiness for Rare Diseases, Disorders, and Syndromes (R21 Clinical Trial Not Allowed)" aimed at supporting clinical projects that enhance readiness for clinical trials in rare diseases. This initiative seeks applications that focus on developing and testing biomarkers and clinical outcome measures, as well as defining the characteristics of rare diseases to facilitate the design of future clinical trials. The program is particularly important for addressing the needs of rare diseases affecting fewer than 200,000 individuals in the U.S., with a maximum budget of $275,000 for direct costs over a project period of up to two years. Interested applicants can find more information and submit inquiries via email to grantsinfo@nih.gov, with the application deadline set for July 20, 2028.