Ethiopia declares its first Marburg outbreak over after 42 days without new cases

Ethiopia has declared its Marburg virus disease outbreak over, marking a significant milestone in a response that began in November 2025 and required intensive surveillance and control measures. The declaration follows a 42-day period without new confirmed cases, a benchmark commonly used in outbreak management for viral hemorrhagic fevers to indicate that chains of transmission have likely been interrupted.

Marburg is a rare but severe illness in the same family as Ebola, and outbreaks tend to demand rapid case detection, isolation, contact tracing, and community engagement to limit spread. Ethiopian authorities and partners focused on enhanced monitoring and response steps aimed at ensuring suspected cases were identified quickly and managed safely, while also reducing risks to healthcare workers and families.

Ending an outbreak does not mean risk disappears. Public health officials typically maintain heightened vigilance even after a formal declaration, because undetected cases, cross-border movement, or renewed exposure to animal reservoirs can reintroduce the virus. Communicating what “outbreak over” means—and what it does not—remains important to prevent complacency and to sustain trust in health guidance.

Still, the announcement provides needed relief for affected communities and health systems. It also offers an opportunity to review what worked—surveillance, laboratory capacity, infection prevention, and coordination—and to strengthen preparedness for future outbreaks, whether Marburg or other high-consequence pathogens.