Ebola has struck the northern part of the Democratic Republic of Congo, but authorities say it is not the same strain as in West Africa.
As West Africa's Ebola toll climbed by 142 cases and 77 deaths, the WHO conceded that the size of the epidemic has been underestimated.
Two medical missionaries are out of the hospital, leaving lessons for clinicians on treating the disease.
The WHO said service suspensions by shippers are starting to squeeze food and fuel supplies in Ebola-affected countries.
The WHO said it saw some signs of improving control efforts and public awareness in Nigeria and Guinea.
Violence in a Monrovia slum was likely fueled by misconceptions about Ebola and suspicions about the actions of government officials and health workers.
The Ebola total in West Africa's outbreak has pushed past 2,000, as the WHO tempered expectations and addressed food supply issues.
The WHO voiced concern about Ebola-related bans on flights to outbreak countries and other African nations.
From travel-related measures to the offer of experimental vaccine, African and non-African nations take steps to control spread.
As deaths top 1,000, a panel says it's ethical to use unlicensed drugs, vaccines.
