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DR Congo starts Bundibugyo Ebola vaccine trial in Bunia
Africanews, Al Jazeera and The Rio Times report that a Phase 2/3 trial of Ebola vaccine candidates, including licensed Ervebo, began in Bunia as Congo’s Bundibugyo outbreak continues.
Wire reporting: (AFP, via Al Jazeera)
A clinical trial of Ebola vaccine candidates against Bundibugyo virus began in Bunia, the capital of Ituri province in the Democratic Republic of Congo, with the first vaccinations reported on Friday, Oct. 23, 20261,2,3.
The study, called Tumaini (also styled TUMAiNi or TUMAINI), is evaluating shots among contacts of confirmed cases as Congo responds to a Bundibugyo outbreak declared in mid-May1,2,3.
Africanews, citing AP, said Congo has confirmed more than 9,000 Ebola cases since the outbreak was declared, with Kenya reporting nine cases and Nigeria confirming a first case this week1. The Rio Times said no vaccine is currently approved specifically for Bundibugyo Ebola2.
Al Jazeera, carrying AFP, said the World Health Organization announced the trial’s start and that participants in Bunia received Ervebo, a vaccine licensed against Zaire Ebola virus, whose protection against Bundibugyo is not established3,2. The Rio Times described Tumaini as a Phase 2/3 adaptive platform that can test several candidates in one framework2.
Africanews said the trial is led by Congo’s National Institute for Biomedical Research, the national public health laboratory, with WHO support1. The Rio Times said INRB is coordinating with the University of Antwerp, with support from WHO, the Congolese Ministry of Health, CEPI and other partners2.
Al Jazeera said the trial uses ring vaccination of contacts judged at high risk of infection and can test safety, efficacy and immunogenicity of multiple vaccines3. It said two Bundibugyo-specific candidates — a ChAdOx1 adenoviral vector shot from the University of Oxford and an mRNA candidate from Moderna, both with CEPI funding — are expected to enter the trial shortly3.
Ituri’s military governor, Maj. Gen. Kasongo Gaby, spoke at a launch event, Africanews reported1. The Rio Times separately noted a BRAVO study reported in September 2026, planned by Médecins Sans Frontières with Congolese authorities and partners, that aimed to enroll about 20,000 frontline workers in Ituri and North Kivu over nine to 12 months, also using Ervebo2.
Whether Ervebo or later candidates reduce Bundibugyo infection or severe disease is not known from the trial’s start2. Outbreak case totals differ slightly across reports and official tallies, and results, timelines for additional candidates, and any future regulatory decisions are not established1,2,3.
Not medical advice.
Sources
How it’s being reported
3 sources
New Tumaini Ebola vaccine trial launches in Bunia as DRC struggles
The launch in Ituri as Congo struggles with a large outbreak, plus case counts in Kenya and Nigeria.
Carries AP reporting plus local color: trial launch in Bunia among contacts of confirmed cases, with Ituri’s governor speaking at the event.
Leaves out Phase, ring-vaccination design, Ervebo as first candidate, and planned Moderna and Oxford shots.
Congo’s Ebola Vaccine Trial in Bunia Explained
The strain gap: licensed Ebola shots target Zaire virus, not Bundibugyo.
Explainer on Tumaini as a Phase 2/3 platform testing Ervebo and later candidates against Bundibugyo, noting no approved Bundibugyo-specific vaccine.
Leaves out Governor remarks and Kenya/Nigeria case counts from Africanews.
WHO announces start of Ebola vaccine clinical trial in DR Congo
Gives this outlet’s account of the story.