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WHO launches first Ebola vaccine trial in DRC amid Bundibugyo outbreak

The World Health Organization has initiated a landmark clinical trial in the Democratic Republic of Congo to test the effectiveness of an Ebola vaccine against the Bundibugyo strain. The study comes as the region grapples with a severe outbreak that has claimed thousands of lives.

LSN India · 24 October 2026

WHO launches first Ebola vaccine trial in DRC amid Bundibugyo outbreak

In a significant step forward in global health response, the WHO has begun the Tumaini trial, marking the first clinical evaluation of the Ervebo vaccine specifically targeting the Bundibugyo virus in the Democratic Republic of Congo. The trial represents a crucial effort to combat a particularly severe outbreak of this Ebola strain.

The Bundibugyo outbreak has emerged as a major public health crisis, with confirmed cases exceeding 9,700 and fatalities surpassing 4,600 since the outbreak was first identified in May. The scale and severity of transmission have prompted urgent international intervention and the rapid mobilization of vaccination strategies.

The Ervebo vaccine, which has shown promise in previous evaluations, will now be rigorously assessed for its efficacy against the Bundibugyo variant. The clinical trial is expected to provide critical data on the vaccine's effectiveness and safety profile in the affected population.

The launch of the Tumaini trial underscores the international community's commitment to containing the outbreak and developing targeted preventive measures. Health officials hope the results will inform vaccination campaigns and contribute to controlling the spread of this deadly virus strain across the region.