Nigeria's health minister will hold an emergency meeting of state health commissioners as West Africa struggles to halt the deadly Ebola virus.
There's a growing concern at the toll among healthcare workers.
Nigeria on Sunday confirmed a fresh case of Ebola in a doctor whose husband died from the virus, adding to a growing list of those providing healthcare in West Africa to be hit by the epidemic.
The woman's husband was also a doctor who died in the city of Port Harcourt on August 22 after treating a patient who had contact with the Liberian man who brought the virus to Nigeria in late July.
She was in a stable condition at an isolation unit in the financial capital, Lagos, said Sampson Parker, the health commissioner of Rivers State, of which Port Harcourt is the capital.
Nigeria's medics have paid a heavy price in the outbreak: of the six people who have died from the disease in Africa's most populous nation, two have been doctors and two others nurses.
Another doctor and a pharmacist were put into isolation at a unit outside Port Harcourt, Parker said.
The Nigerian health officials meeting on Monday are not the only ones in the region struggling with the problem of how to treat victims of the deadly virus while protecting those treating them.
More than 120 health workers have died and over 240 others infected so far.
The disease has killed a total of 1,552 people and infected 3,062 as of August 26, according to WHO figures.
In Guinea, where 430 people have died, nurses told AFP they lacked basic medical equipment to treat patients and had even bought items such as gloves and protective clothing themselves.
In Senegal, doctors were treating a young Guinean man who became the country's first confirmed case of the disease. He was said to be in a "satisfactory" condition in hospital on Saturday.
The case lends credence to fears that the haemorrhagic fever, for which there is currently no vaccine, is spreading rapidly.
Stockholm authorities on Sunday said a suspected case of Ebola had been discovered in the Swedish capital. A local health specialist told AFP the patient was from an African country and had arrived in Sweden a few days ago.
At current infection rates, the WHO fears it could take six to nine months and at least $US490 million ($A530 million) to bring under control, by which time over 20,000 people could be affected.
The Ebola crisis has also cast doubt over a number of international football fixtures involving the worst-hit countries, with qualifying beginning next week for the 2015 Africa Cup of Nations.
Sierra Leone, where 422 people have died so far, named a 20-man squad consisting entirely of foreign-based players for its matches against Ivory Coast and the DR Congo.
Ivory Coast's government has refused to allow the game to be played in Abidjan and not announced an alternative venue. The Ivorians risk forfeiting the match if they fail to show up.
Ebola-linked restrictions have led to sporadic violence in recent weeks. In Guinea, 55 people were injured in the second-largest city N'Zerekore after two days of protests this week over a government-imposed curfew.
The WHO has credited public health campaigns, especially in Guinea and Nigeria, for limiting the transmission of Ebola.
