DRC's deadliest Ebola outbreak may have started months earlier

The Democratic Republic of Congo is confronting the deadliest Ebola outbreak ever recorded in the country, a crisis that health officials now believe may have begun several months before it was officially declared in May. Preliminary investigations and retrospective case reviews suggest that the virus was circulating undetected in the eastern province of North Kivu as early as late 2022, predating the first laboratory‑confirmed case that triggered the formal emergency response.

Genetic sequencing of virus samples, combined with epidemiological tracing, has identified a cluster of unexplained hemorrhagic fevers that align with the current strain, indicating an earlier start to transmission. The delayed detection has prompted the World Health Organization and the Congolese Ministry of Health to reassess surveillance protocols and expand contact‑tracing efforts to include the previously unlinked cases. While vaccination campaigns and treatment centers remain operational, authorities emphasize that the revised timeline underscores the need for heightened vigilance to prevent further spread and to improve early‑warning mechanisms for future outbreaks.