The World Health Organization (WHO) says it could take up to nine months before a vaccine against this particular strain of Ebola is ready. WHO experts said two potential vaccines targeting the Bundibugyo strain are being considered, but neither has yet undergone clinical trials. They believe the outbreak in Congo and Uganda likely began a few months ago, with investigations ongoing to trace the chain of transmission. Experts say the outbreak is particularly concerning because it spread undetected for weeks across a densely populated area. #news #ebola #africa #WHO #virus