The transition from chimpanzee biomedical research to retirement in accredited sanctuaries represents a landmark welfare achievement but requires sustained long-term funding.
The retirement of NIH chimpanzees from research represents a significant welfare achievement but the transition process is slow and the funding commitment is perpetual. Chimpanzees that spent decades in research conditions require years of careful rehabilitation before joining social groups. Some animals have permanent behavioral abnormalities that make full rehabilitation impossible. The long-term welfare cost of their research use continues in sanctuary long after formal research ends.