The pharmaceutical companies developing these vaccines, as well as the ones which are a little bit further along the development path, are committing to ramping up the production capacity to millions of doses to be available in 2015 with hundreds of thousands ready in the first half of next year," she said.
Vaccine trials in the worst-affected countries could begin in December, Dr Kieny said.
US nurses
In the US, two nurses infected with Ebola while caring for dying Dallas patient Thomas Duncan have been declared free of the virus.
One of them, Nina Pham, 26, had a meeting with President Barack Obama at the White House, hours after being discharged.
"I feel fortunate and blessed to be standing here today," she said. "I am on my way back to recovery."
The other nurse, Amber Vinson, has also been declared virus-free, but she will remain in treatment in Atlanta until further notice.