Outbreak history on May 16

Historical outbreak-response milestones recorded on this calendar date, drawn from WHO Disease Outbreak News, CDC archives, and primary epidemiological literature.

• 2026

  Ebola

  WHO declares Bundibugyo Ebola PHEIC in DRC and Uganda

  WHO Director-General Tedros Adhanom Ghebreyesus declared the Ebola disease caused by Bundibugyo virus in the Democratic Republic of the Congo and Uganda a Public Health Emergency of International Concern, following spread from Ituri Province into Kampala via a confirmed imported case. This is the largest recorded Bundibugyo virus outbreak and the ninth-ever PHEIC.

  Glossary: PHEIC

Browse the full outbreak history calendar for milestones across all dates.