Ebola
Ebola reaches Nigeria, and a puzzle over how it got there
Nigeria confirmed its first Ebola case, linked by sequencing to Kenya's, and no one yet agrees where the patient caught it.
Timeline
Ebola
Ebola.
Timeline
Ebola is first identified in outbreaks in Zaire and Sudan
Bundibugyo virus is identified during an outbreak in Uganda
West Africa enters the largest Ebola epidemic on record
Eastern DRC begins a major Ebola outbreak that later crosses into Uganda
WHO declares the 2026 Bundibugyo outbreak a Public Health Emergency of International Concern
A worker at the Irkutsk anti-plague institute dies after severe pneumonia
Mystery death at Russia's anti-plague institute remains unexplained
Kenya confirms its first imported Bundibugyo virus disease case
Kenya confirms an imported case of Bundibugyo virus disease
Mystery death at Russia's anti-plague institute remains unexplained
WHO says the Russian laboratory worker's cause of death remains undetermined
Mystery death at Russia's anti-plague institute remains unexplained
Nigeria confirms its first case of Bundibugyo Ebola, in Abuja
First participant vaccinated in a trial of vaccines against Bundibugyo Ebola, in Bunia
Kenya records its second Ebola death as Nigeria reports a genetic link to Kenya's first case
Recent stories
Ebola
Mystery death at Russia's anti-plague institute remains unexplained
WHO says there is no evidence of spread from the Russian case, but the cause of the laboratory worker's fatal pneumonia remains unknown.