Sierra Leone announces a quarantine for its western regions, as more US health workers are evacuated.
Though patterns look promising in Sierra Leone and Liberia, cases spiked in Guinea.
Other Ebola developments include the departure of Cuba's team from Liberia, new information on evacuee contact monitoring, and outbreak case totals.
An American health worker is in critical condition, and several US health worker contacts, and one from the UK, have been flown home for observation.
As an infected American health worker arrives at the NIH, potentially exposed US and UK health workers are flown home.
Another American health worker has been infected with Ebola in West Africa's outbreak region.
Incidence has declined little since late January, but Liberia has now gone 2 weeks with no cases.
The committee has been tasked with presenting by May a report on what has been called a slow response to the outbreak.
With its Mar 7 launch date, the trial's main goal is to see if ring vaccination can knock down Ebola hot spots.
Although Liberia had no new cases, Guinea reported 51 and Sierra Leone 81 as response hurdles emerge.
