Liberia Chimapanzees Sanctuary
In this handout photo released by Humane World for Animals, a chimpanzee formerly used in research receives a comprehensive health check at a retirement sanctuary for chimpanzees, in Bapakwali, Liberia, on Aug. 25, 2026.
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Chimpanzees once used in hepatitis B vaccine experiments are getting health checks at their new home in Liberia. The West African chimpanzees receive care like teeth cleaning and X-rays at the Second Chance Chimpanzee Refuge. More than 400 chimps were used by American researchers from the 1970s until the early 2000s. Liberia has the second-highest number of chimpanzees in West Africa. The checks assess long-term health and tailor care plans. The sanctuary's veterinarian says these checks are vital for the chimps' well-being. The impact of the experiments on the chimps is still being assessed.
