A growing Ebola outbreak in Democratic Republic of the Congo has triggered international concern after health officials confirmed weeks of undetected transmission in a conflict-hit region with limited medical access. The outbreak involves the rare Bundibugyo species of Ebola virus, which has no approved vaccine or targeted treatment. Health experts warn that delayed detection and ongoing regional instability could complicate containment efforts. According to the World Health Organization, authorities have already recorded nearly 250 suspected cases and around 80 deaths linked to the outbreak. The WHO recently declared the situation a public health emergency of international concern. However, experts stress that the outbreak does not resemble the early stages of a Covid-style global pandemic. “The risk Ebola poses to the whole world remains tiny,” said Dr Amanda Rojek from Oxford University’s Pandemic Sciences Institute. “But it does reflect that the situation is complex enough to require international coordination.” Health officials remain particularly concerned about neighbouring countries including Uganda, South Sudan and Rwanda due to strong trade and travel connections. Uganda has already confirmed two Ebola infections linked to the outbreak, including one death. Rare Bundibugyo Virus Creates New Challenges The Bundibugyo species has caused only two previous outbreaks, in 2007 and 2012. Past outbreaks killed roughly 30% of infected patients. Unlike other Ebola strains, Bundibugyo currently has no approved vaccine or antiviral drug treatment. “Dealing with Bundibugyo is one of the most significant concerns in this outbreak,” said Professor Trudie Lang from Oxford University. Doctors currently rely on supportive treatment including fluids, nutrition, pain management and treatment of secondary infections. Symptoms usually appear between two and 21 days after infection. Early signs resemble flu, including fever, headaches and fatigue. Severe cases later trigger vomiting, diarrhoea, organ failure and, in some cases, internal or external bleeding. The outbreak initially confused health officials because early Ebola tests returned negative results. Laboratories later confirmed Bundibugyo using more advanced testing methods. The first known patient was a nurse who developed symptoms on April 24. “Ongoing transmission has occurred for several weeks, and the outbreak has been detected very late, which is concerning,” said Dr Anne Cori from Imperial College London. Conflict and Population Movement Increase Risks The outbreak has spread through eastern Congo’s conflict-affected mining areas, where large mobile populations frequently move between towns and across borders. The region already hosts more than 250,000 displaced people because of armed conflict and insecurity. “Many of the affected areas are mining towns with highly mobile and transient populations,” Lang said. “This mobility increases risk as people move between communities and across borders.” Health teams are now racing to identify infected patients, trace contacts and strengthen hospital infection controls. Officials are also focusing on safe burial practices because Ebola spreads through infected bodily fluids including blood and vomit. Despite growing concerns, experts note that Congo has substantial experience handling Ebola outbreaks. “The response is significantly stronger today than it was a decade ago,” said Dr Daniela Manno from the London School of Hygiene & Tropical Medicine. Health officials say the coming weeks will determine whether authorities can contain the outbreak before it expands further across the region.