Mystery over source of Ebola infection in Nigeria fuels concern about spread of virus

Key Points:

• Health officials in Africa are investigating how Nigeria's first Ebola case in over a decade was infected, amid concerns the outbreak could spread further after reaching four African countries.
• The Nigerian patient, the Ugandan-born wife of a Swiss diplomat, likely contracted Ebola while traveling in Uganda, contradicting earlier reports that she had traveled to the Democratic Republic of Congo (DRC), where the outbreak began.
• The Africa CDC is exploring possible contact with an Ebola patient in Kenya, as both traveled from Uganda's Entebbe airport on the same day, though experts remain skeptical of this link without stronger epidemiological evidence.
• Nigerian authorities say the case is contained with ongoing contact tracing, while experts emphasize the need for rapid cross-border information sharing and resource allocation to prevent further transmission.
• The current outbreak, caused by the rare Bundibugyo virus, has infected over 9,500 people and killed nearly half, making it the largest and deadliest in DRC's history and second only to the 2014-16 West Africa Ebola epidemic.