The number of cases in the Ebola outbreak has exceeded 10,000, with almost 5,000 deaths from the disease.

The World Health Organization says only 27 of the cases have occurred outside the three worst-hit countries, Sierra Leone, Liberia and Guinea.

Those three countries account for all but 10 of the fatalities.

Mali became the latest nation to record a death, a two-year-old girl.

More than 40 people known to have come into contact with her have been quarantined.

Meanwhile, medical workers flying into two of America's busiest airports face being forcibly quarantined if they have been in contact with Ebola patients in west Africa.

The strict rules would apply to JFK and Newark airports.

The decision by the health authorities follows former Doctors Without Borders medic Craig Spencer testing positive for the disease in New York, several days after he returned from Guinea.

Dr Spencer, 33, was able to travel on the subway and go bowling before he showed many of the symptoms of the virus and had to go to hospital.

The US government said it was considering adopting the move for the whole country after it emerged that Dr Spencer had already been checked at the border and declared safe.

Hours after the policy was announced, a female healthcare worker who had been quarantined when she arrived from the affected region into Newark Liberty International Airport, New Jersey, was isolated with a fever.

She had no symptoms on arrival at the airport before being quarantined, but is now being evaluated at University Hospital, Newark.

New York Governor Andrew Cuomo said. "We've seen what happens... You ride a subway. You ride a bus. You could infect hundreds and hundreds of people."

Nurses cured

The White House, meanwhile, has offered another video briefing on the virus:

In Washington, Barack Obama sought to reassure members of the public by hugging Dallas nurse Nina Pham, who was one of the first to be treated for the virus in the US.

She had caught it while working as one of the medical staff treating a man who had earlier arrived from Liberia and who later died of the disease.

Ms Pham, 26, was declared cured on Friday, and gave a speech, thanking those who had treated her.

She said: "I feel fortunate and blessed to be standing here today."

Officials said she did not take any experimental drugs, but she did use blood plasma from previous survivor Dr Kent Brantly, who she also thanked.

Her colleague Amber Vinson, who caught the disease at the same time, was also declared cured, but was not yet well enough to leave hospital.

Dr Spencer remains in a stable condition in an isolation ward at Bellevue Hospital Center in New York undergoing treatment.

The disease has now killed nearly 4,900 people - most of them in the countries of Liberia, Guinea and Sierra Leone.

Top Obama administration officials have met to discuss any potential new rules for healthcare workers returning to the US.

The latest case comes as the World Health Organisation announced that it expects hundreds of thousands of doses of a new Ebola vaccine to be available by early next year.

Originally published at 10:50am