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A British man who survived the Ebola virus has apparently travelled to the US in the hope of helping a new victim of the deadly disease.
Will Pooley has reportedly offered to undergo a blood transfusion to help the American, who has not been named, overcome the virus.
The Foreign Office said the 29-year-old nurse had flown to Atlanta over the weekend after he was issued with an emergency passport to help facilitate the trip.
Mr Pooley's blood will now contain natural antibodies that could help protect against the virus.
A French volunteer with charity Medecins Sans Frontieres has contracted the Ebola virus in Liberia.
The aid worker, who is the first French national to contract the disease during this outbreak, was put in quarantine on September 16 when she started showing symptoms of the disease.
She will be evacuated to a specialist treatment in France.
The International Monetary Fund (IMF) has said it could provide Guinea, Liberia and Sierra Leone with an extra $127m to fight the spread of the Ebola virus.
The money has not been approved by the IMF's executive board, but it could help cover gaps in the west African nations' finances.
"The Ebola outbreak is a severe human, social and economic crisis that requires a resolute response from the international community," IMF Managing Director Christine Lagarde said in a statement.
The response to trying to find an Ebola vaccine is one of the fastest to any epidemic ever seen, the professor who is leading the British trial said.
Professor Adrian Hill told ITV News it was "totally unprecedented" and added: "I've never seen anything happen so quickly before in terms of getting a vaccine trial started.
"We've done in days what might take months, or certainly weeks, so it's been fantastic to see that in a month we've gone from deciding to do this to actually vaccinating people."
The professor warned "lots could go wrong" but said so far he believed the vaccine was safe.
The current trials are expected to commence in December after being tested on 140 people both in Britain and in Africa.
If the results show it has been successful, stockpiles of the drug will then be distributed to those most in need.
A former NHS nurse has become the first Briton to test a potentially life-saving new vaccine to tackle the deadly Ebola virus in West Africa.
Ruth Atkins was injected with the experimental drug, called Chimp Adenovirus type 3 (ChAd3), which has so far only been trialled in primates, this morning.
Ms Atkins, an NHS communications manager from Marcham in Oxfordshire, said: "I feel absolutely fine, it felt no different to being vaccinated before going on holiday."
She said she volunteered after hearing about the trials on the radio.
"The situation in West Africa is so tragic. I thought being part of this vaccination process was something small I could do to hopefully make a huge impact."
Ms Atkins is one of 60 volunteers taking part in a UK trial at Oxford University over the coming weeks.
Professor Adrian Hill, who is leading the trial at the university's Jenner Institute, hailed it as a "very important step" in bringing the disease, which has so far killed more than 2,250 people, under control.
He said: "This vaccine has never been given to a person before so it's a very important step in fighting the outbreak of Ebola.
"If everything works well over the coming months we will hopefully be using this for health care workers by the end of the year."
The most devastating ever outbreak of Ebola could cause economic ruin in West Africa if it is not contained by the end of next year, the World Bank said.
Slow containment of the disease in Guinea, Liberia and Sierra Leone could lead to it spreading further.
In the worst-case scenario Guinea's economic growth could shrink by 2.3%, while Sierra Leone's growth would cut by 8.9%.
But Liberia would be hardest hit with a reduction of 11.7% growth, a statement from the global development leader said.
The doctor who helped discovered the deadly Ebola disease has said it is unlikely the epidemic will be over within the next six months.
Professor Peter Piot, Director of the London School of Hygiene and Tropical Medicine, told ITV News the virus has now killed more people than all the previous recorded outbreaks.
He said: "Every day a hundred people are dying. The most affected countries need more doctors and nurses. There is currently about one physician for every 1,000 patients."
Phase one of a drugs trial to test a new Ebola vaccine begins in Britain today.
Professor Piot said: "I hope that the vaccine will work but it will be a few months before we have the results.
"Will the vaccine come in time to stop the current epidemic? We don't know.
"It is unlikely that this epidemic will be over within the next six months but we need to do everything we can."
A healthy Briton will today become the first person to receive a potential new vaccine for the deadly Ebola virus.
The volunteer will be one of 60 people given the drug by experts at Oxford University.
If successful, it will be used to treat patients in West Africa where the worst ever outbreak has now killed more than 2,500 people.
The vaccine, developed by the US National Institutes of Health and British drug company GlaxoSmithKline (GSK), targets the "Zaire species" of Ebola, which is one of the strains circulating in West Africa.
It is the first time the vaccine, which has previously been successfully tested on primates, has been trialled on humans.
The volunteers will not be infected with the disease but given a single dose of the benign Ebola virus protein to generate an immune response.
The trials are conducted on healthy people to see whether they suffer any side effects.
President Obama has said US government experts think there is an "extremely low" chance of an outbreak of Ebola in America.
Speaking at the Centers for Disease Control and Prevention (CDC), Mr Obama said: "I want the American people to know that our experts here at the CDC and across our government agree that the chances of an Ebola outbreak here in the United States are extremely low."
Latest ITV News reports
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
A Swansea doctor who took leave to treat Ebola patients in Africa, is back on the wards after three weeks in isolation.