Mice and humans given doses of sweetener also showed signs of glucose intolerance.
As U.S. prepares to ramp up aid to West Africa, clinics and workers remain overwhelmed.
The needs have outstripped the government’s and partners’ capacity to respond, one health agency says.
Sweep of labs after smallpox discovery turns up improperly stored vials of ricin and plague bacteria.
Federal authorities arrest former NECC employee as he attempts to board flight to Hong Kong.
WHO and CDC officials say countries need to act now as fourth American in Liberia tests positive for virus.
He is the fourth American to be diagnosed with Ebola in West Africa.
As the virus has repeatedly mutated in recent months, the WHO seeks to stop the outbreak within nine months.
Scientists say sequencing of Ebola genome also offers clues to outbreak’s origins.
The vaccine does not allow Ebola genes to replicate, so it can’t infect vaccinated people, an official says.