The Ebola death toll continues to climb, despite the global attention on the outbreak.
In numbers released Wednesday by the World Health Organization, 128 new cases were diagnosed between Aug. 10 and Aug. 11 alone, and 56 died.
The disease has infected and killed people in four West African nations: Guinea, Liberia, Sierra Leone and Nigeria.
Disease trackers have identified and isolated the vast majority of the people who came into contact with victims in Sierra Leone, Guinea and Nigeria, the WHO said in a statement. Such contact tracing is considered essential to bringing the outbreak under control
In Liberia, which had 71 of the new cases, contact tracing has proved much more difficult, the WHO said, and more international help is needed. Three provinces are under quarantine, enforced by the Liberian Army, in an attempt to slow the spread.
Nigeria, where the outbreak began when a sick Liberian-American traveled there, seems to be containing the disease. In Lagos, Africa's most populous city, 12 people were sickened after contact with Liberian-American Patrick Sawyer, who died shortly after arriving in the country.
There were no new cases of the disease in Nigeria between Aug. 10 and Aug. 11, though one previously identified patient died.
A leading physician in Sierra Leone's fight against Ebola has died from the disease, an official said Wednesday, as it emerged that another top doctor last month was considered for an experimental treatment.
Ultimately, doctors decided against using the drug and he died before he could be airlifted out of the country. There was very little of the experimental treatment available, which has stoked debate about ethics on who should get it even though it hasn't been tested in humans. There is no way of knowing if the drug, known as ZMapp, made a difference in the few people who have gotten the now-exhausted supply of the drug.
Only two Americans and a Spaniard have received ZMapp, an unproven and experimental anti-Ebola drug made in the United States.
Many of the dead in this outbreak are health workers, who are often working with inadequate supplies and protection.
Doctors considered giving ZMapp to Sheik Humarr Khan, the chief doctor treating Ebola in Sierra Leone who had come down with the deadly disease, but eventually decided against it "after taking (his) clinical and treatment conditions into account," officials at the WHO said in an e-mail to the Associated Press on Wednesday.
Now doses of ZMapp have been allocated to two Liberian doctors and could arrive as soon as Wednesday in Liberia, according to Liberian Health Minister Walter Gwenigale. They would be the first Africans known to receive the treatment.
Contributing: Associated Press