Scientists search for Ebola vaccine amid W. Africa crisis

Medical personnel at the emergency entrance of a hospital receive suspected Ebola virus patients in Conakry, Guinea, on March 29, 2014. (AP photo)
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One of the most concerning things about the Ebola virus, which has killed more than 700 people in West Africa, is that there is no specific treatment and no cure.

But, scientists are working on several vaccines and one is showing promise in the early stages of development.

Experts say one vaccine has been tested in primates. This fall, safety testing will begin in humans. If all goes well, the hope would be to have a vaccine available by the end of next year.

Public health officials would target those most at risk for becoming infected, those who take care of the sick.

"Not a lot of doses to be sure but enough to at least, if it does work to protect the health care workers,” said Dr. Anthony Fauci, Director of the National Institute for Allergy and Infectious Diseases.

The two Americans infected with Ebola in West Africa remain in serious condition.