The Ebola outbreak in DR Congo has passed 3,500 cases, making it the world's second-largest outbreak on record. The current epidemic has now overtaken the country's deadliest previous outbreak, which had held that position. Officials have declared this the fastest-spreading Ebola epidemic ever recorded and called for greater global attention to the crisis. The outbreak involves the Bundibugyo strain of the virus, for which there is no approved vaccine or treatment. Health authorities are struggling to contain the spread as cases continue to rise. The warning from officials underscores the urgency of the situation, as the lack of medical tools for this strain makes the response more difficult. The outbreak has already surpassed the scale of all but one previous Ebola epidemic worldwide, with only the 2014-2016 West Africa outbreak being larger. The situation remains serious, and health experts say international support is critical to stopping further spread.