The WHO raised its risk assessment for the outbreak in Congo to "very high" from "high", with the health body saying late detection, the absence of a vaccine or virus-specific therapeutics, widespread armed violence and high mobility among the population make the country vulnerable.

The deadly Ebola outbreak raging in central Africa probably began several months ago, the World Health Organization said Wednesday, deeming the risk high in the region but low…

The World Health Organization on Friday said the outbreak is spreading rapidly and now poses a “very high” risk nationally.