Ethiopia declares the end of its first Marburg virus outbreak after 42 days with no new cases

Ethiopia has officially declared the end of its first outbreak of Marburg virus disease, a rare but severe hemorrhagic fever. The declaration followed the completion of the standard 42-day period with no new confirmed cases, a benchmark used to indicate that chains of transmission have been broken. The outbreak was first confirmed in the South Ethiopia Region in November 2025 and prompted an intensive public health response coordinated by the Ethiopian government with technical support from international partners.

Health authorities reported 14 confirmed cases during the outbreak, including nine deaths and five recoveries. Officials also described additional deaths categorized as probable cases, reflecting the challenges of diagnosing and tracking a fast-moving disease in areas where access to testing and care can be constrained. Three health workers were infected during the response, underscoring the occupational risks clinicians face when caring for patients with hemorrhagic fever and the importance of stringent infection prevention and control measures inside health facilities.

Marburg virus is linked to fruit bats and can spread between people through close contact with bodily fluids of infected individuals or through contaminated materials. Symptoms can include fever and muscle pain, followed by gastrointestinal illness such as vomiting and diarrhea, and in some cases severe bleeding. Public health officials have repeatedly emphasized that rapid isolation, effective contact tracing and community engagement are essential to stopping transmission, particularly because there is no widely licensed vaccine or specific approved treatment for Marburg, leaving supportive care and prevention as the primary tools.

During the response, officials highlighted surveillance and follow-up as central tactics. Contacts of confirmed cases were identified and monitored through the incubation window, and response teams worked to ensure that suspected cases were rapidly detected and managed. Infection-control practices were strengthened in affected districts, including protocols around protective equipment, safe care and safer handling of materials that may carry infectious fluids.

The declaration that the outbreak has ended does not mean the risk disappears permanently. Epidemiologists often caution that spillover events can recur where viruses circulate among wildlife, and they stress continued preparedness—strong laboratories, training for frontline health workers, rapid investigation capacity, and clear public communication—so that any future suspected clusters can be contained quickly.

Why the 42-day mark matters

Public health practice commonly uses 42 days—two full incubation periods for diseases such as Marburg and Ebola—as a threshold to declare an outbreak over. The idea is to provide high confidence that undetected infections are not still generating new cases. Ethiopia’s announcement indicates the country maintained surveillance through that period without finding new confirmed infections, allowing authorities to shift from outbreak response into ongoing monitoring and resilience-building.