Soldiers in two of the infected countries deployed today to try to stem further spread of the virus.
Even if the experimental drug ZMapp is manufactured in large quantities, its ability to treat Ebola is unproven and furthermore no commitment has been publicly made to provide it to Africa.
The health minister of Nigeria, one of the four countries where Ebola has broken out, told a news conference in Washington that he had asked the US Centers for Disease Control and Prevention about access to the drug. But a CDC spokesman said yesterday "there are virtually no doses available."
Some people in affected countries already have wondered why the drug wasn't offered to any infected people in Africa. Dr. Anthony Fauci of the National Institutes of Health said the manufacturer has told the US government that it would take two to three months to produce even "a modest amount."
"We don't even know if it works," he stressed.
President Barack Obama, who hosted an Africa summit this week, pledged to help "nip as early as possible any additional outbreaks of the disease.
"And then during the course of that process, I think it's entirely appropriate for us to see if there are additional drugs or medical treatments that can improve the survivability of what is a very deadly and obviously brutal disease, Obama said yesterday.
Underscoring desperate attempts to stop the disease, which has killed almost 1,000 people since March, troops deployed to block people traveling to Liberia's capital today from rural areas hit by Ebola.
President Ellen Johnson Sirleaf declared a national state of emergency, and officials said today that no one with a fever would be allowed in or out of the country.
In neighboring Sierra Leone, military forces also deployed as part of "Operation Octopus" which officials said was aimed at preventing "the unauthorized movement of Ebola-infected persons."
While the outbreak has now reached four countries across West Africa, Liberia and Sierra Leone account for more than 60 percent of the deaths, according to the World Health Organization. The outbreak that emerged in March has claimed at least 932 lives.