Key points from article :
A trial of two drugs showed significantly improved survival rates against Ebola.
More than 90% of infected people can survive if treated early with the most effective drug.
The drugs, REGN-EB3 and mAb114 attack the Ebola virus with antibodies.
WHO declared the Ebola crisis in Congo a "public health emergency of international concern".
The study was published in Lancet medical journal.