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National and Provincial Response
Health zone context
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Clinical Symptoms

Coming soon.

Surveillance and Testing

Coming soon.

The latest report detailing the genomic characterisation and epidemiology of the BDBV outbreak in the DRC can be found here.

A more detailed report of the data, methodology, and result interpretation can be found at virological.org/t/genomic-epidemiology-of-the-ongoing-2026-bundibugyo-virus-disease-outbreak-in-the-democratic-republic-of-the-congo/1045.

Phylogeny

Time-scale phylogeny of sequenced Bundibugyo viral genomes, with tips coloured by health zone where sample collection took place. Node bars indicate the 95% HPD of the inferred dates.
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Effective population size

Estimated effective population size (Nₑ) of the outbreak through time (up to the latest sample in the phylogeny). A rising curve indicates a growing epidemic; a plateau or decline indicates slowing transmission. Shaded regions represent the 95% credible intervals.

Confirmed cases & genomes

Daily confirmed cases from the phylogenetic analyses rolling-positivity table (upward bars) and sequenced genomes from the phylogeny tips (inverted bars), stratified by Mongbwalu, Bunia/Rwampara, and other health zones. Sequencing coverage is a trailing five-day rate: 100 × (genomes in the window) / (confirmed cases in the window). Note: cases are dated by symptom onset and genomes by collection date, so day-to-day percentages should not be read literally — use the line to follow changing trends.

Cases vs sequenced genomes

Each point is a health zone: total confirmed cases from the rolling-positivity table versus genomes in the phylogeny. Marker size scales with the fraction of cases sequenced (genomes / cases). Zones well below the proportional reference line have disproportionately few sequences relative to their case burden. Toggle Raw for linear counts or Log–log to compare zones across orders of magnitude.