The World Health Organization (WHO) has declared the Ebola crisis in the Democratic Republic of Congo (DRC) a public health emergency of international concern.
But it stressed borders should not be closed, adding that the risk of the disease spreading outside the region was not high.
The outbreak in the DRC has killed more than 1,600 people.
This week, the first case was detected in Goma, home to more than a million.
WHO chief Tedros Adhanom Ghebreyesus told a news conference in Geneva that he had accepted the recommendations of a committee of experts which stressed there should be no restrictions on travel or trade, and no entry screening of passengers at ports or airports outside the immediate region.