Ebola challenge 'biggest since HIV/Aids' - US

The Ebola outbreak in West Africa is unlike anything since the emergence of HIV/Aids, top US medical official Thomas Frieden has said.

A fast global response could ensure that it did not become "the next Aids," the director of the Centers for Disease Control and Prevention (CDC) said.

The presidents of Liberia, Sierra Leone and Guinea appealed for more aid to help fight the disease.

Ann Soy reports.