Former vaccine-test chimpanzees receive comprehensive health exams at Liberian sanctuary
A group of chimpanzees once used in hepatitis B vaccine research are undergoing full medical check-ups at a refuge in central Liberia.
More than 400 chimpanzees were used by American researchers in Liberia for hepatitis B vaccine experiments for several decades, many taken from the wild as infants. In 2015, Humane World for Animals assumed permanent responsibility for the remaining 60 individuals, relocating them to a mangrove-covered island sanctuary in central Liberia. The animals, now averaging 30 to 35 years old, are being anesthetized for head-to-toe examinations that include dental cleaning, X-rays, heart, lung and nervous system assessments, as well as blood sampling and booster vaccinations.
Veterinarian Belen Perez Hernando highlighted the importance of these checks for animals that endured invasive procedures. While the full impact of the past experiments is still being evaluated, sanctuary staff hope the medical care will give the chimps a dignified second chance.
Why it matters
Ensuring the health of former research chimpanzees highlights ethical responsibilities toward animals used in past scientific studies.
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