Luckily, those diseases, which often kill humans, don't kill chimps. They did, however, suffer disabilities. Animal-rights activist Gloria Grow and veterinarian Richard Allan worried about the chimps. They decided the chimps, who can live to be 60 years old, deserved a nice retirement home. Other chimps aren't so lucky.
Chimpanzees are an endangered species.
Only about 200,000 remain. Grow's new friends seem happy now. After years of living alone they didn't know how to act around others. Now they hug each other after they have a fight.