The death toll in the world's worst Ebola outbreak has risen to 5,459 out of 15,351 cases identified in eight countries by the end of November 18, the World Health Organization (WHO) said Friday. The figures showed an increase of 39 recorded deaths and 106 new cases of the deadly virus since Wednesday. "Transmission remains intense in Guinea, Liberia, and Sierra Leone," the U.N. health agency said of the three hardest-hit West African countries that account for all but 15 of the deaths. In Mali, all six Ebola cases now have died, and more than 325 contacts exposed to the virus are being monitored in the capital, Bamako, the WHO said. A Cuban doctor, the first infected with Ebola, was evacuated overnight from Sierra Leone to Geneva by the WHO. He is in isolation, in stable condition, and has been given the experimental drug ZMapp, Swiss authorities said. Earlier Friday, the WHO declared a separate outbreak of Ebola in Democratic Republic of Congo (DRC) was over after nobody showed symptoms for two incubation periods since the last case. There were 49 deaths out of 66 people infected in the remote northwestern Equateur province.