Chimpanzees were used extensively in biomedical research for decades, but growing recognition of their cognitive complexity, strong social bonds, and emotional depth has driven a global move toward ending their use in research.
Chimpanzees used in research, particularly invasive biomedical procedures, experienced profound psychological trauma from social isolation, repeated anesthesia, and invasive procedures. Retired research chimps require specialized sanctuary care addressing decades of trauma. The welfare legacy of chimpanzee research provides a powerful case study for precautionary welfare frameworks.