Nearly half of 9,500 Ebola victims dead as outbreak reaches fourth nation

The Bundibugyo Ebola outbreak in Africa has infected more than 9,500 people, with nearly half of those cases resulting in death. This surge has pushed the crisis to a new geographic extent, as the virus now spans four nations: the Democratic Republic of Congo, Uganda, Kenya, and Nigeria.

The timeline of the epidemic began on 15 May when the outbreak was first announced in DR Congo. By June, cases had appeared in Uganda, though the World Health Organization declared that country Ebola-free in August. The situation changed in late September and early October when Kenya reported confirmed cases. On Friday, Nigerian health authorities confirmed the nation's first Ebola patient in more than a decade, a Ugandan-born woman who is the spouse of a Swiss diplomat based in Abuja.

Disputes over the patient's origin have emerged between Swiss and Ugandan officials. The Swiss foreign ministry stated that the woman did not travel to DR Congo and believed she contracted the virus while traveling with her husband in Uganda. This account contradicts earlier statements from Uganda, which claimed the woman had visited eastern DR Congo. A Ugandan government spokesperson told Reuters on Thursday that Uganda had no active cases and would publicize any new infections.

Investigators are currently examining a potential link to Kenya. Dr Wessam Mankoula, head of emergency preparedness at the Africa Centres for Disease Control and Prevention, noted that both the Nigerian patient and a Kenyan case traveled through Uganda's Entebbe airport on 3 October. Catherine Smallwood, a WHO Ebola incident manager, said the timing of the Nigerian patient's symptoms must be compared to determine if infection occurred at the airport. However, Marion Koopmans, a member of the WHO Ebola emergency committee, called the airport theory very speculative without evidence of shared space.

The virus strain involved has no approved treatment or vaccine. Muhammad Ali Pate, Nigeria's health minister, stated that contact tracing is ongoing to prevent community spread. Melaku Yirga, vice-president for Africa at Prosper Global, emphasized the need for rapid cross-border information sharing to manage the response.

This is the largest and deadliest Ebola outbreak in DR Congo's history. It ranks as the second largest globally, behind the 2014-16 west Africa epidemic, which infected more than 28,600 people and killed more than 11,000.