As deaths top 1,000, a panel says it's ethical to use unlicensed drugs, vaccines.
In recent days, Guinea closed its borders, and suspected cases in Canada and Saudi Arabia were ruled out.
Along with the agency's declaration came an emergency committee's list of steps to limit disease spread.
The Obama administration is setting up an Ebola working group to consider making policy for the possible use of experimental drugs in West Africa's Ebola epidemic, Reuters reported yesterday, while the Food and Drug Administration (FDA) lifted a barrier to the potential use of an unlicensed drug made by a Canadian company.
An official of a leading aid group asserts that inaction by the rest of the world has let the disease get out of control.
Liberia and Sierra Leone have taken new actions to curb infections, as response activities and testing of possible travel-related cases play out on other continents.
With the situation in Nigeria worsening, CDC takes an action it last took during the 2009 H1N1 flu pandemic.
Treatment of two US citizens with an Ebola drug raises ethical questions over who should get scarce, unlicensed drugs.
The second American infected with Ebola returned home today, as new information emerged about experimental treatment use and more possible cases.
CDC experts cover a range of issues, such as proper protective equipment.
