“The World Health Organization is cautiously optimistic about the progress of the Ebola response in Democratic Republic of Congo after 90 per cent of people at risk in the city of Mbandaka were vaccinated, a senior WHO official said on Tuesday.”

http://www.theeastafrican.co.ke/scienceandhealth/WHO-optimistic-Ebola-outbreak-after-vaccinations/3073694-4585732-p3ug5u/index.html