The National Institutes of Health (NIH), through the National Institute on Drug Abuse (NIDA), has announced the Single Cell Opioid Responses in the Context of HIV (SCORCH) Program, which aims to support exploratory studies via R21 grants. This funding opportunity focuses on data mining of single-cell datasets to identify cell types and molecular responses related to HIV, antiretroviral therapy (ART), and substance use disorders (SUDs), as well as conducting functional validation studies to enhance understanding of the biological mechanisms involved. Eligible institutions can apply for funding up to $275,000 for a project period of up to two years, with applications accepted starting February 19, 2025, and a deadline of March 20, 2026. For more information, applicants can contact NIH Grants Information at grantsinfo@nih.gov or visit the opportunity's webpage at https://grants.nih.gov/grants/guide/rfa-files/RFA-DA-26-002.html.