The US response to the crisis, to be formally unveiled later by President Barack Obama, includes plans to build 17 treatment centers, train thousands of healthcare workers and establish a military control center for coordination, US officials told reporters.
The World Health Organization has said it needs foreign medical teams with 500-600 experts as well as at least 10,000 local health workers, numbers that may rise if the number of cases increases, as it is widely expected to.
So far Cuba and China have said they will send medical staff to Sierra Leone. Cuba will deploy 165 people in October while China is sending a mobile laboratory with 59 staff to speed up testing for the disease. It already has 115 staff and a Chinese-funded hospital there, Reuters reported.
But Liberia is where the disease appears to be running amok. The WHO has not issued any estimate of cases or deaths in the country since Sept 5 and its Director-General Margaret Chan has said there is not a single bed available for Ebola patients there.
Liberia, a nation founded by descendants of freed American slaves, appealed for US help last week.
A UN official in the country said on Friday that her colleagues had resorted to telling locals to use plastic bags to fend off the killer virus, for want of any other protective equipment.
Medecins Sans Frontieres, the charity that has been leading the fight against Ebola, said it was overwhelmed and repeated its call for an immediate and massive deployment.