OXFORD, England --- Health officials are set to begin trials on a vaccine to prevent Ebola.

The death toll of the Ebola outbreak in Africa has now risen to more than 1500 people.

So far, 3000 people have been infected, and forty percent of those cases have come in just the past three weeks.

The hope moving forward is to have results of the trial vaccine by the end of the year.

"Nobody has ever taken a vaccine from first test in a human being, to thinking of actually using it to save lives three months later," said University of Oxford's Dr. Adrian Hill.

Right now officials are working on a method to determine who will get the vaccine, and also a means to deliver the vaccine to those people.