The World Health Organization declared a global health emergency over an outbreak that has spread to more than a dozen African countries.

The World Health Organization declared a global health emergency over an outbreak that has spread to more than a dozen African countries.

The epidemic is concentrated in the Democratic Republic of Congo, but the virus has now appeared in a dozen other African countries.

The American-backed talks in Switzerland, starting on Wednesday, aim to halt a catastrophic civil war. But only one side says it will turn up.