Health workers are handling the disease with minimal resources, because agencies have been scrambling to bring aid into the region.

The head of the WHO on Saturday visited eastern Congo's Bunia, a city at the heart of an outbreak of a rare type of Ebola, where the virus is spreading faster than the response despite better-organized health facilities and new aid arrivals.

Five patients have recovered from a rare type of Ebola virus, the head of the World Health Organization said Sunday during a visit to Bunia in eastern Congo.