The Ebola outbreak in the Democratic Republic of Congo has now claimed 600 lives, figures published by the World Health Organization showed Thursday – only three days after the figure topped 500. Updated numbers issued by the UN health agency showed there have been 1,759 confirmed cases in DR Congo since the outbreak was declared in mid-May, including 600 confirmed deaths. Two other people have died in neighbouring Uganda, where 17 patients have recovered out of 20 total confirmed cases. "The outbreak continues to expand, and its true scale has not yet been fully established," Anne Ancia, the WHO's representative in the DRC, said Tuesday. Watch moreAuthorities race to contain spread of Ebola in eastern DR Congo The Africa Centres for Disease Control and Prevention (Africa CDC) on Thursday said the current outbreak was the "fastest-growing ever". "This is the fastest-growing Ebola outbreak ever, not only among the previous Bundibugyo outbreaks, but all the different viruses that are causing Ebola," Dr Wessam Mankoula, head of emergency preparedness and response, told reporters. The WHO's figures for the DRC, which come from the health authorities in the vast country, show that the outbreak there has a case fatality rate of 34 percent. A total of 285 patients in the DRC have recovered, while 304 suspected cases of the viral haemorrhagic fever are under investigation. The Congolese government's latest report, published late Wednesday, said two new cases were suspected in Kisangani in the Tshopo province, where cases had not been previously recorded. According to the report, one of the two suspected cases was linked to the Nia-Nia health zone in Ituri province, where the first cases were reported, while the other case “has no apparent geographical connection to known outbreaks”. Authorities were investigating.