"The Phase I trial saw 20 volunteers injected with the vaccine in September. Two suffered mild fevers but none got seriously ill. Within four weeks, all were producing Ebola antibodies. Half the group received a dose ten-times larger than the rest, which resulted in greater antibody concentrations."
"The trial was designed to provide protection both against the Zaire strain currently ravaging West Africa, as well as Sudan Ebola. Some of the participants only produced antibodies against one or other strain, but most showed responses to both. Two other vaccines, one targeting Zaire Ebola alone, are also in Phase I human trials."
Ebola Vaccine Passes First Human Trial | IFLScience
The first human trials of a vaccine against Ebola have been successful, but it will be months, at best, before it can be used to stem the outbreak in West Africa. The origins of the vaccine go back more than a decade. A chimpanzee cold virus was modified to carry Ebola genetic material conferring protection against the Zaire strain of Ebola. This was shown to be effective in monkeys, although the benefits wore off with time.