Four drugs have been tried on patients in the Democratic Republic of Congo, where there's a major outbreak of the virus.
When the researchers took a deeper look at how patients fared when they seek treatment early in the disease progression, the drugs looked promising.
The Washington Post reports that the drugs have been tested in a almost nine-month clinical trial and have performed so well that health professionals will now administer them to every patient in Congo.
The treatments, known as REGN-EB3 and mAb-114, are both monoclonal antibodies which block the virus from invading a patient's cells.
The early results mark "some very good news", said Dr Anthony Fauci of the U.S. National Institutes of Health, which helped fund the study.
More than 1,300 people have been vaccinated in the city of Goma, close to the border with Rwanda, and since the beginning of August, there have been no reports of new cases confirmed.More news: CHP officer, suspect killed in Riverside gun battle
The World Health Organization has made a decision to narrow an experiment with Ebola patients to two treatments that show real promise. After the results are finalized, an Expanded Access Phase will be initiated using the lead therapeutic from the trial.
The study was co-sponsored and funded by the INRB and the National Institute of Allergy and Infectious Diseases (NIAID) of the NH, and carried out by an worldwide research consortium coordinated by the WHO. On the other hand, 33% of participants who received remdesivir and 24% of participants who received ZMapp died.
The survival rate among patients with low levels of the virus in their blood was as high as 94% when they were given REGN-EB3, and 89% when on mAb114, the agency said.
What impact could the drugs have?
The complete results will be submitted for publication in the peer-reviewed medical literature as soon as possible.
"The best way to end the outbreak is with a good vaccine, as well as to do good contact tracing, isolation, and then, ultimately, treatment".
World Health Organization specialists explain that the drugs attach anti-bodies to the outside of the EBOLA virus, destroying it.More news: Iran warns of war if Israeli warships enter Persian Gulf
How serious is the DR Congo outbreak?
Researchers began trials with four treatments last fall.
In July, the WHO declared the Ebola crisis in the country a "public health emergency of worldwide concern".
The current outbreak in the DRC is the worst on record after an epidemic that struck mainly in Liberia, Guinea and Sierra Leone between 2014 and 2016, leaving more than 11,300 people dead.
The response to the epidemic has been hampered by violence, including attacks on humanitarian and medical personnel, prompting the UN Security Council to call "for an immediate cessation of hostilities by all armed groups" earlier this month.
Earlier this month, three Congolese doctors were arrested in DR Congo over the killing of a World Health Organization medic.
Efforts to introduce the Janssen vaccine had been opposed by Congo's minister of health, Oly Ilunga, who argued it could cause confusion in communities due to different vaccination schedules. In one incident, family members assaulted health workers who were overseeing the burial of their relative.More news: Nightdive Studios is officially working on System Shock 2 Enhanced Edition