An Ebola virus outbreak in West Africa has killed more than 460 people since February and is taking other casualties, as well — among wild chimps and gorillas. And some researchers worry that our animal research ethics may interfere with our efforts to protect those endangered animals.An Ebola virus outbreak in West Africa has killed more than 460 people since February and is taking other casualties, as well — among wild chimps and gorillas. And some researchers worry that our animal research ethics may interfere with our efforts to protect those endangered animals.