Ebola has wiped out a third of the world's gorillas and chimpanzees

Ebola is currently the single greatest threat to the survival of gorillas and chimpanzees, having killed off a third of their populations since the 1990s.

The virus is even more deadly to great apes that it is for humans, with mortality rates as high as 95% for gorillas and 77% for chimpanzees. That compares to around 50% for humans.