Backing off on earlier, rosier predictions, an official said large trials in West Africa could begin in January.
All travelers whose flights originate in outbreak countries must enter the US through 1 of 5 airports.
The guidance emphasizes unexposed skin and suggests either N-95s or PAPRs for respiratory protection.
Ron Klain will lead the US response, and Obama allows Guard and Reserve forces to battle Ebola.
No new cases in Senegal in 42 days, but hundreds have surfaced in the hardest-hit countries.
Hospital executive faced tough questions from Congress about speed bumps in the response to the quickly evolving Ebola situation.
The Ebola virus responsible for an outbreak in the Democratic Republic of the Congo (DRC) that began in July bears similarities to previous outbreaks in equatorial Africa but is distinct from the virus causing the ongoing epidemic in West Africa and has a different zoonotic origin, say results of a study today in the New England Journal of Medicine.
The nurse had flown from Ohio hours before she reported having a fever.
The CDC has set up a special team to assist any hospital that has a confirmed Ebola patient.
Much of the meeting focused on effective vaccine, as a US official announced a large clinical trial in Liberia in December.
