<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.ijumaa shirika la afya duniani -who, lilisena idadi ya vifo kutokana na mlipuko wa ugonjwa wa ebola umeongezeka kufikia zaidi ya watu elfu nne.  <response>: on friday, the world health organization said the death toll from the ebola outbreak has risen to more than 4,000 people. 