Switzerland's foreign ministry has confirmed that the woman, a 42-year-old Ugandan-born national living in Abuja, tested positive for the virus on 20 October. She is receiving treatment in isolation and showing signs of improvement, according to the World Health Organization (WHO).
Her husband, also a Swiss diplomat, is in isolation but has not developed any symptoms. The ministry said all 25 staff at its embassy in Nigeria were in good health and did not need to isolate, a decision taken in consultation with Nigeria's Ministry of Health and the WHO. The embassy remains open with health and safety measures in place.
The woman returned to Nigeria on 3 October after spending about two and a half weeks in Uganda. She developed symptoms four days after arriving in Abuja and sought treatment at two private clinics before testing positive. The Swiss government told Reuters she did not travel to the Democratic Republic of Congo, contradicting earlier accounts from Ugandan health officials who said she had visited eastern DRC for business. The WHO, Africa Centres for Disease Control and Prevention (Africa CDC) and Nigeria's health ministry said they had not received verified information confirming she had visited the country.
Health authorities are investigating whether she may have been exposed at Uganda's main airport on the same day as a Kenyan man who died from Ebola. The Africa CDC described this as 'one of the possible scenarios' but stressed no link had been established. The Kenyan man had travelled from DRC through Uganda and arrived in Nairobi on 3 October. Kenya has since confirmed eight other Ebola cases, all linked to the first patient with no evidence of wider community transmission.
Nigerian authorities are tracing more people beyond the 44 contacts initially identified. The WHO said it was too early to determine where she became infected, noting that investigators had struggled to obtain a complete travel history while she remained in hospital. Genomic sequencing has been prioritised and has confirmed the Bundibugyo species of Ebola, the same strain causing the outbreak in DRC.
Uganda has maintained it has no active Ebola cases and says the woman's travel through the country does not necessarily mean she was infected there. The WHO's regional director for Africa, Dr Mohamed Janabi, has called for 'regional vigilance' and urged countries to strengthen surveillance.
