Major Shift in U.S. Research Policy: CDC to End All Nonhuman Primate Experiments by 31 December 2025

Abstract

On 21 November 2025, the U.S. Centers for Disease Control and Prevention (CDC) received an internal directive from  the Department of Health and Human Services (HHS) ordering the complete termination of all in-house research  involving nonhuman primates — approximately 200 macaques — by the end of the calendar year. This is the first time  since the NIH chimpanzee retirement in 2015 that a major federal agency has fully shuttered an active,  government-owned NHP colony. The decision, driven by persistent primate shortages, documented biosafety  incidents, translational failures of NHP models, and the accelerating maturity of human-relevant alternatives  (organoids, microphysiological systems, organ-on-chip platforms, and AIintegrated digital twins), constitutes one  of the most far-reaching policy realignments in U.S. biomedical research since the Animal Welfare Act of 1966 and  the FDA Modernization Act 2.0 of 2023. This Industry News analysis places the CDC directive in full scientific, ethical,  and regulatory context, evaluates the evidence base, addresses remaining challenges, and explores the  transformative opportunities this shift creates for the organoid and bioscience sectors.