Millions of doses of two experimental Ebola vaccines could be ready in 2015, the World Health Organisation (WHO) has said.
The WHO also announced that five more experimental vaccines will begin testing in March.
However, the agency warned it is not clear whether any of these will work against the deadly virus that has already killed more than 4,800 people this year.
Dr Marie-Paule Kieny, from the agency, said there could be millions of doses of an Ebola vaccine in 2015 if early tests prove that the two leading candidates are safe and effective.
If the early trials hint at success, larger trials testing the vaccines in West Africa could begin as soon as December, Dr Kieny said.
She said five other possible Ebola vaccines should start being tested in March.
Trials of the two most advanced vaccines - one developed by GlaxoSmithKline in co-operation with the US National Institute of Health, the other developed by the Canadian Public Health Agency - have already begun in the US, the UK and Mali.
"The vaccine is not the magic bullet. But when ready, they may be a good part of the effort to turn the tide of this epidemic," Dr Kieny said.
In an indication of how the rising spread of Ebola is upending many attempts to halt this year's outbreak, Dr Kieny admitted that plans were changing "week to week" as governments, health agencies and donor countries tried to speed up efforts to fight the deadly virus.
GSK said it might be able to make about one million doses of its vaccine per month by the end of 2015, assuming that some logistical and regulatory hurdles can be overcome.
Dr Kieny said even if the Ebola outbreak was slowing down by the time many vaccine doses were available, it would still be useful to start a stockpile for future Ebola outbreaks.
She said some details about getting the vaccines to West Africa had yet to be worked out, including who would pay for immunisation campaigns - which were not planned to start before June at the earliest.
Dr Kieny said the charity Doctors Without Borders pledged to create a vaccine fund and other organisations, including the World Bank, might help buy the vaccines.
She also acknowledged that, given the speed at which these experimental vaccines are being rolled out, "there will certainly not be as much known in terms of their safety as would be normal".
Dr Kieny said Britain had proposed creating a fund that would offload liability from pharmaceutical companies in case any bad side effects emerge from the shots.
In Brussels on Friday, the European Union and its 28 member nations managed to create a one billion euro fund (£788 million) to fight the Ebola outbreak.
Britain's contribution of £205 million was the largest among the EU nations.
"Helping West Africa to cope with the crisis is the most effective way to prevent a serious outbreak of the disease elsewhere," the EU leaders said at the end of a two-day summit.
"The scale of the epidemic is a threat not only to the economy and the stability of the affected countries, but also to the region as a whole. "