CDC Phases Out Monkey Research in Landmark Shift
The Centers for Disease Control and Prevention (CDC) is ending all research conducted on monkeys, a decision hailed by animal welfare groups as a major step toward ethical alternatives.
Key Takeaways
- CDC to phase out studies using nearly 200 macaques
- Move aligns with broader federal shift away from primate research
- Animal welfare groups call decision “historic” and “seismic”
- Some scientists express concern about impact on HIV research
Federal Agencies Embrace Alternative Research
Scientists have routinely used rhesus and pig-tailed macaques housed at CDC’s Atlanta headquarters to study infectious diseases including HIV, hepatitis, and tuberculosis. The agency now joins other federal bodies like the National Institutes of Health and Food and Drug Administration in moving away from non-human primate studies.
These agencies are increasingly investing in advanced alternatives such as chip-based systems that simulate human biology and lab-grown human organs.
Animal Welfare Groups Celebrate Decision
Animal welfare organizations welcomed the CDC’s move as a significant development in finding ethical research alternatives.
“A top science agency recognising the massive expense of acquiring and using primates, the poor results for human predictivity, and the moral concerns about the use of these cognitively complex animals is a landmark development,” said Wayne Pacelle, president of the Center for A Humane Economy. “This is a seismic development in the realm of research science.”
Janine McCarthy, acting director of research policy at the Physicians Committee for Responsible Medicine, called the decision “historic.”
“For the first time, a U.S. agency is choosing modern, human-relevant science over a failed system of monkey experiments,” Dr McCarthy said. “Now, the CDC should use that funding to transition to human-relevant research and to ensure that these monkeys are sent to sanctuaries for the remainder of their lives.”
Public Safety Concerns and Scientific Pushback
The decision comes amid growing public concern about monkey experimentation, highlighted by incidents of primates escaping from research facilities. The U.S. has reported over a dozen such escapes in the past two decades, raising disease transmission risks to first responders and local communities.
However, some scientists expressed concern about the impact on ongoing research. They noted that CDC monkey studies had been crucial in developing HIV prophylaxis and preventive medicines.
“It’s a huge loss for the HIV field,” Deborah Fuller from the Washington National Primate Research Center told Science Magazine. “There are no real alternatives.”
The fate of the nearly 200 captive macaques remains unclear as the CDC implements this phase-out.



