The Ebola outbreak in the Democratic Republic of Congo is the "fastest growing" ever recorded, according to African health authorities. The World Health Organization confirms it has killed 600 people.
There have been 1,759 confirmed cases since the outbreak was declared in mid-May. Cases are estimated to be doubling every 28 days.
Officials state the virus is moving faster than deploying resources to control it. They have called for US$1.4 billion in funding for the response.
The current outbreak is caused by the Bundibugyo species, which has no approved vaccine or treatment. The case fatality rate is 34 percent.
The outbreak is focused on Ituri province, an area plagued by armed groups. Persistent insecurity and a fragile health system are complicating control efforts.
A trial for two potential treatments began on July 2. UN officials have called for an immediate end to fighting in South Kivu province, which is also affected.