WHO Director-General Tedros Adhanom Ghebreyesus stated that at its current pace, the outbreak is on track to eclipse the West African Ebola outbreak of 2014 to 2016
— a historic crisis that killed more than 11,000 people out of roughly 28,000 cases.
WHO Warns DR Congo Outbreak Poses Historic Threat
The outbreak in eastern DR Congo has already killed more than 2,000 people out of more than 4,300 recorded cases, making it the fastest-moving Ebola outbreak on record. Although the government formally declared the emergency on May 15, health officials revealed that genetic sequencing shows the virus actually began circulating months earlier, in February. Dr. Mohamed Janabi, WHO Africa director, noted that early infections were initially misdiagnosed as malaria or typhoid, giving the epidemic a significant head start. We are chasing the virus, the virus is ahead of us,
Janabi said at a news conference in Bunia.
Genetic Analysis Points to Animal Spillover and Rare Strain
The findings indicate the outbreak is driven by a previously unseen variant of the rare Bundibugyo species of the virus. The strain is genetically distinct from previous Bundibugyo viruses seen in outbreaks in 2007 and 2012, suggesting it stemmed from a fresh transmission from animals to humans before spreading between people. Genetic analysis also confirmed that cases detected in Uganda are linked to the DR Congo outbreak.
Unlike recent viral flare-ups, this outbreak involves a strain for which no vaccine or treatment has yet been approved. Symptoms of the rare and highly contagious disease can appear within two to 21 days and include sudden flu-like signs such as fever, headache, and tiredness, which can progress to vomiting, diarrhoea, and organ failure. The virus spreads via contact with infected bodily fluids like blood, vomit, or semen, as well as contaminated materials such as bedding and clothing.
Containment Challenges and Projections
Response efforts in eastern DR Congo have been severely hampered by regional instability and ongoing conflict near borders with South Sudan, Uganda, and Rwanda. Weak infrastructure, under-resourced clinics, circulating misinformation, community wariness of outsiders, and health worker strikes over unpaid wages have further slowed the response. Because of these barriers, health workers are only reaching about 30% of cases, leaving most new infections and deaths in communities outside professional reach.

Dr. Abdirahman Mahamud, WHO’s director for health emergency alert and response operations, stated that the agency’s moderate projection has the outbreak peaking within six months. However, under a more severe scenario, the outbreak could stretch on for nine to 12 months.
Vaccine and Treatment Developments
Global health bodies and researchers are advancing multiple countermeasures to combat the Bundibugyo strain:

- Clinical trials of two possible antiviral treatments began in Ituri, the most affected of five provinces where cases have been reported.
- The UK’s medicines regulator, the MHRA, granted permission for human trials of a vaccine created by a University of Oxford team using the same technology as the Oxford-AstraZeneca Covid vaccine. Three other groups are also developing different vaccines for Bundibugyo.
- Tedros confirmed that two vaccines developed specifically for the Bundibugyo virus are being tested in people for the first time.
- The WHO also plans to test whether an existing Ebola vaccine could protect people against the virus following promising animal study results.
Researchers and WHO officials emphasize that wider access to testing and virus sequencing will be critical to detecting future outbreaks earlier and improving containment efforts.
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