VOICED : After life of trauma, Liberian lab chimps settle into retirement

The video discusses a chimpanzee refuge located on islands near Monrovia, Liberia. These chimpanzees were subjected to invasive medical procedures by the New York Blood Center in the 1970s. During Liberia's civil war, caretakers kept the chimpanzees alive despite funding challenges. In 2015, the New York Blood Center withdrew funding, but animal rights groups and Citigroup stepped in to help. The chimpanzees cannot be released into the wild due to potential risks to other populations. Future plans include sterilizing males to control population growth, as chimpanzees can live up to 60 years.

Why can't the chimpanzees be released back into the wild?

What is the plan for managing the chimpanzee population on the islands?