Congo's Ebola outbreak has surpassed 4,000 confirmed cases, with experts warning the true number may be much higher as the epidemic continues to spread.

Congo's Ebola outbreak has surpassed 4,000 confirmed cases, with experts warning the true number may be much higher as the epidemic continues to spread. Link Ebola outbreak in Congo tops 4,000 cases in world's second-largest epidemic Researchers believe Congo's Ebola outbreak began months before it was officially declared, with the true scale of infections likely much higher.