Thanks. Looks like a great read about zoonotic diseases.

But what I'm wondering is whether zoonotic diseases from Central Africa generally represent more serious threats than do those from the rest of the world.

Those diseases traveled just as much as we did since the time of 'Lucy'.

The reason you see more of these from Central Africa (and that's one of the reasons I linked the book) if I understand it correctly is that there are some traditions there that make the species jump that much easier.

But all it really takes is a large number of people and a large number of animals in close proximity. Nature tends to find ways to exploit such opportunities.