A further three people have been put under observation for Ebola in Madrid, bringing the total number of people quarantined there to 16.
The United Nations has said the number of Ebola cases is doubling every three to four weeks. There have now been more than 4,000 deaths from around 8,300 cases in west Africa.
The US Centers for Disease Control and Prevention has predicted the number of cases could reach 1.4 million by January unless efforts to contain the virus are stepped up
The disease has now been registered in seven countries, as Britain and America prepare to introduce a screening programme for the virus at airports and railway terminals.
JFK airport in New York will begin screening today. Teams with thermal guns and questionnaires will screen travellers from West African countries hit hardest by the outbreak.
Screening at four other airports in America - Newark Liberty, Washington Dulles, Chicago O'Hare and Hartsfield-Jackson Atlanta - will begin next week, as well as London's Heathrow and Gatwick airports.
The UN's special envoy to the Secretary General, Dr. David Nabarro issued this stark warning to world leaders.
Meanwhile, the Irish Nurses and Midwives Organisation is warning that overcrowding in Irish hospitals could lead to the spread of Ebola if it is detected in this country.
The group says it doesn't want to cause panic, but it does want the HSE to explain how it plans to deal with suspected cases.
The HSE insists the chances of the virus reaching Ireland remains very low.
But Phil Ní Sheaghadha of the INMO says we should be better prepared.
Serious concerns remained in Spain over how the virus could have spread in the country's main isolation centre at the Carlos III hospital in Madrid.
Healthcare workers told AFP the quarantine floor where 44-year-old nurse Teresa Romero was infected was shut last year as a result of spending cuts.
They said it only re-opened for two missionaries flown back from Africa with the disease in August.
Ms Romero, who caught the deadly virus while caring for the pair, was said to be in a "stable but serious" condition on Friday.
The hospital took in three more patients for observation on Friday, bringing to 17 the number under surveillance, including Ms Romero, her husband and other medical staff.
Elsewhere, a public building in Paris was briefly evacuated on Thursday when an African man became unwell. Test showed he did not have Ebola.
In Macedonia people who had come into contact with a Briton who died after exhibiting Ebola-like symptoms were quarantined.
A Guinean man in Brazil feared to have Ebola was also quarantined, although the authorities stressed it was a precautionary measure and he no longer had a fever.
The Moroccan government has called for the 2015 Africa Cup of Nations to be postponed due to the epidemic.
Ebola causes fever, diarrhoea, vomiting and in some cases internal and external bleeding, and is spread by contact and the exchange of bodily fluids.
Originally published at 8:45am
