# DR Congo Ebola outbreak becomes second-largest in history with 3,532 cases and 1,556 deaths as contact tracing fails on 80 percent of new infections
> The Bundibugyo strain Ebola outbreak in the Democratic Republic of the Congo passed 1,500 deaths and 3,500 confirmed cases by July 31, making it the second-largest Ebola outbreak in recorded history after the 2014-16 West Africa epidemic; contact tracing is now missing four in five new cases, according to TechTimes, meaning the surveillance system has effectively lost sight of the chain of transmission

**Meta:** type: event · date: 2026-07-30 · heads: 삶은 어떻게 바뀌는가, 장기전 · 3 takes · 3 lenses · 2 regions

## Summary

The Ebola outbreak in eastern [DR Congo](/ko/entity/democratic-republic-of-congo), driven by the Bundibugyo strain, reached 3,532 confirmed cases and 1,556 deaths by July 31, making it the second-largest Ebola outbreak in recorded history, surpassed only by the 2014-16 West Africa epidemic that killed more than 11,000. The DRC government released the 1,500-death figure on July 30; by July 31 the toll had risen further. Critically, [WHO](/ko/entity/who) and DRC health officials reported that contact tracing now captures only one in five new infections, meaning the surveillance and containment system has effectively lost track of 80 percent of the transmission chain. No approved vaccine exists for the Bundibugyo strain, unlike the zaire-strain outbreaks of 2018-20.

## The split

US broadcast and digital media reported the 1,500-death milestone primarily as a numbers story. Al Jazeera's coverage added the structural obstacle that no Bundibugyo-strain vaccine exists, distinguishing this outbreak from those where vaccination campaigns could be deployed. The contact-tracing collapse figure appeared in TechTimes but was absent from wire-service coverage in the verified feed, suggesting it has not yet entered mainstream international reporting.

## By the numbers

- 3,532, confirmed cases as of July 31.
- 1,556, deaths as of July 31.
- 80 percent, share of new cases now missed by the contact-tracing system.
- 2, rank of this outbreak in recorded Ebola history by case count.
- 0, approved vaccines available for the Bundibugyo strain driving this outbreak.
- 4, July 27 to July 31 days to add roughly 332 cases, indicating continued acceleration.

## Why it matters

Losing contact tracing on four in five new infections means the outbreak's size is now unknown from below: 3,532 confirmed cases is a floor, not an estimate. The [WHO](/ko/entity/who) and DRC health system cannot tell how many chains of transmission are active or where the outbreak is spreading next. A Bundibugyo strain outbreak with no vaccine and deteriorating surveillance in a conflict-affected region of [DRC](/ko/entity/democratic-republic-of-congo) is in exactly the conditions that allowed the 2014-16 West Africa epidemic to grow undetected until it was out of control.

## What to watch

- Whether the WHO declares this a Public Health Emergency of International Concern (PHEIC) or raises the threat level.
- Progress on any emergency-use vaccine candidates for the Bundibugyo strain.
- Whether the case count continues to accelerate past 4,000 over the coming week.
- Cross-border spread to Uganda, Rwanda, or South Sudan, all of which share porous borders with the affected eastern DRC provinces.

## Regional takes (batched by bias / lens)

### US broadcast network; first major English-language report to mark the 1,500-death threshold, citing DRC government figures and framing the milestone as the outbreak's trajectory continuing upward
- **ABC News** (United States, en) — ABC News reported that more than 1,500 people had died from Ebola in the DRC outbreak as of July 30, citing DRC government figures, and noted that the outbreak was continuing to spread; the report marked the 1,500 death milestone as a threshold that underscored the scale of the emergency.
  > "More than 1,500 people have died from Ebola as an outbreak continues to spread in the eastern DRC, according to government figures released on Thursday."
  Source: https://abcnews.com/Health/ebola-deaths-surpass-1500-drc-outbreak-continues-spread/story?id=135221474

### Qatari broadcaster; provided the critical detail that no vaccine exists for the Bundibugyo strain of Ebola, distinguishing this outbreak from the 2014-16 West Africa epidemic and the 2018-20 DRC Kivu outbreak where vaccines were available
- **Al Jazeera** (Qatar, en) — Al Jazeera reported the 1,500-death milestone and added the vital caveat that there is still no approved vaccine for the Bundibugyo strain driving this outbreak, in contrast to the zaire-strain outbreaks for which a vaccine was developed; the broadcaster also noted the country is struggling to exercise control in infected areas.
  > "There's still no vaccine for the Bundibugyo strain of the virus as the country struggles for control in infected areas."
  Source: https://www.aljazeera.com/news/2026/7/30/congos-ebola-death-toll-passes-1500-as-it-struggles-to-halt-spread

### US science and technology outlet; reported the most alarming surveillance figure, that contact tracing now tracks only one in five new cases, meaning the response system has lost effective visibility over 80 percent of new infections
- **TechTimes** (United States, en) — TechTimes reported that the DRC Ebola outbreak has officially become the second-largest in recorded history, with 3,532 confirmed cases and 1,556 deaths as of July 31, and added the critical surveillance failure: contact tracing is now tracking only one in five new cases, leaving 80 percent of new infections outside the monitoring system.
  > "DRC Ebola outbreak 2026 has officially become the second-largest in recorded history, with 3,532 confirmed cases and 1,556 deaths as of July 31, and contact tracing now misses 80 percent of new cases."
  Source: https://www.techtimes.com/articles/322531/20260731/ebola-kills-1556-drc-response-system-tracks-only-one-five-new-cases.htm

## Across the graph
- Related: [[drc-ebola-3200-0727]], [[drc-ebola-1000-deaths-0722]], [[drc-ebola-fastest-growing-jul9]]
- Entities: Democratic Republic of Congo, Who

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Canonical: https://rbtfl.xyz/ko/n/drc-ebola-second-largest-0731