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A Bundibugyo virus outbreak was first reported on May 15th, 2026 in Ituri province, Democratic Republic of the Congo, with multiple cases reported across health zones during the early phase of the outbreak and suggestions of circulation weeks prior to detection. We pair highly resolved case and testing records with human mobility data to investigate the early outbreak dynamics of Bundibugyo virus disease (BVD). We show that human movement was a principle driver of early spatial expansion between May 10th and June 1st when the number of health zones and health areas reporting positive cases increased by 12 and 49, respectively. The early doubling time was estimated at ~10 days. Our work shows the rapid spatial expansion and growth of BVD with implications for intervention strategies.
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Ebengo et al. (2026) studied this question.
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