Could changes in the Ebola virus be contributing to the severity of the DRC outbreak as health authorities race to contain rising infections?
The Ebola outbreak in the Democratic Republic of the Congo has crossed 4,000 cases, prompting health authorities to dramatically step up efforts to find infections in communities. WHO and Africa CDC are warning that the outbreak is moving faster than the response in some parts of the country, while officials investigate whether the unusually severe outbreak could be linked to changes in the virus. ()
The Democratic Republic of the Congo is facing an increasingly serious Ebola outbreak, with confirmed infections surpassing 4,000 as health authorities struggle to keep pace with transmission.
The outbreak, caused by the Bundibugyo species of Ebola virus, was first officially reported on May 15, although health officials have raised concerns that the virus may have been spreading undetected since January.
As of August 4, the DRC had recorded 3,973 confirmed cases, 1,801 deaths and 776 recoveries across 51 health zones in five provinces, according to the World Health Organization. In the latest 24-hour reporting period covered by WHO, another 99 confirmed cases and 52 deaths were recorded.
The Africa Centres for Disease Control and Prevention and WHO have now called for a major expansion of the response, arguing that conventional containment measures are no longer moving quickly enough to match the spread of the disease.
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Officials Investigate Possible Virus Changes
The rapid growth and severity of the outbreak have raised questions about whether the virus itself may have changed.
Africa CDC Director-General Jean Kaseya said officials plan to conduct studies to determine whether there is an additional factor contributing to the severity of the outbreak, including the possibility that the virus may be mutating. The investigation is being prompted by what officials describe as an unusually severe outbreak involving the Bundibugyo strain.
Importantly, a mutation has not been confirmed as the cause of the outbreak’s rapid spread or severity. The planned studies are intended to establish whether genetic changes or other factors could help explain the current situation.
The possibility has nevertheless added urgency to the response as health officials confront transmission that is increasingly difficult to trace.
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More Than Two-Thirds Of Deaths Reported In Communities
One of the most worrying features of the outbreak is where people are dying.
According to reporting cited by The Guardian, more than two-thirds of Ebola deaths are occurring in communities rather than treatment centres. At an MSF treatment centre in Bunia, around 90% of admitted patients reportedly were not listed as contacts of previously identified Ebola cases.
That suggests that a significant amount of transmission may be occurring outside the formal surveillance network.
Contact tracing is also falling well short of the level health authorities consider necessary. WHO reported that only 75% of contacts were being followed up, compared with an operational target of at least 95%.
Africa CDC officials have also said that response teams were identifying roughly 10 contacts for every Ebola patient, compared with an expected figure of around 40.
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Response Shifts From Contact Tracing To Door-To-Door Searches
With conventional contact tracing struggling to identify transmission chains, health authorities are changing their approach.
Instead of relying primarily on people already linked to known cases, community health workers are preparing to conduct active searches for sick people. The strategy involves going door to door, asking households about people who may be experiencing symptoms associated with Ebola.
The shift is designed to identify patients who have not previously been connected to the official Ebola surveillance system.
Africa CDC has described the move as a broader escalation of the response, with officials saying the time for incremental measures has passed.
The strategy also places communities at the centre of the response. WHO and Africa CDC say residents need clear information from trusted local voices so that people recognize symptoms, report suspected cases quickly and seek treatment without fear.
Ituri Remains The Epicentre
The outbreak is heavily concentrated in Ituri province, which accounts for nearly 90% of confirmed cases in the DRC, according to WHO.
Bunia, Rwampara and Mongbwalu are among the health zones reporting the greatest burden. The region faces additional difficulties because of insecurity, population movement, poor road access and pressure on an already stretched healthcare system.
These conditions can make it difficult for response teams to reach affected communities, collect samples, transport patients and maintain regular surveillance.
WHO also reported that treatment-centre occupancy in North Kivu had reached 139%, highlighting the strain placed on beds, healthcare workers and other response resources. At the time of the WHO assessment, 674 people were under care.
Healthcare Services Are Also Being Disrupted
The Ebola outbreak is affecting more than patients infected with the virus.
The Guardian reported that other essential healthcare services are being disrupted as fear of Ebola and interruptions to medical services discourage families from visiting health facilities.
In Mongbwalu, one of the affected mining communities, the proportion of children receiving their first measles vaccination dose reportedly fell by 69%.
Such disruptions can create a secondary public health problem. When vaccination, maternal care, childhood treatment and other essential services are interrupted during an outbreak, communities can become vulnerable to additional diseases and preventable deaths.
WHO Calls For Stronger Community Action
Following a joint mission to Uganda and the DRC on August 4 and 5, WHO and Africa CDC called for a community-led approach to containing the outbreak.
The delegation, led by WHO Director-General Tedros Adhanom Ghebreyesus, Africa CDC Director-General Jean Kaseya and WHO Regional Director for Africa Mohamed Janabi, visited Kampala, Bunia and Kinshasa.
In Bunia, the delegation met government officials, healthcare workers, community representatives and response partners. It also visited the Rwangole Ebola Treatment Centre to assess its ability to expand access to care.
The organizations stressed that communities must be directly involved in surveillance, referrals, treatment, safe and dignified burials and decisions affecting their families.
Community, religious, women’s and youth leaders are also being encouraged to help build trust and counter misinformation.
Uganda Shows That Containment Is Possible
The situation in neighboring Uganda provides an important contrast.
Uganda declared its Ebola outbreak over on July 28, after recording 20 confirmed cases and two deaths. All previously identified contacts completed follow-up.
WHO and Africa CDC said Uganda’s experience demonstrated the value of early detection, rapid contact tracing, coordinated national action, trusted community engagement and strong cross-border surveillance.
However, the agencies warned that Uganda and other neighboring countries cannot lower their guard while transmission continues in the DRC.
Regional surveillance, laboratory preparedness and cross-border coordination remain essential because people frequently move between affected areas and neighboring countries.
Possible Use Of Remdesivir And Vaccine Testing
Authorities are also examining additional medical tools that could help treat or prevent infections.
Officials told The Guardian that remdesivir, an antiviral drug, is planned for use on a compassionate basis in treating Ebola patients.
They are also preparing to assess whether Ervebo, a vaccine licensed for protection against another Ebola virus species, could be used in the current outbreak. Officials cited preliminary data suggesting that people who had received the vaccine may have experienced less severe disease, although its effectiveness against the Bundibugyo virus responsible for this outbreak needs to be properly assessed.
These measures are being considered alongside public health interventions rather than as replacements for surveillance, isolation, infection prevention and community engagement.
Boat Incident Raises Concern About Wider Spread
Authorities are also investigating a suspected Ebola death involving a passenger who travelled on a boat heading toward Kinshasa from northeastern DRC.
The other passengers were expected to be quarantined and tested as part of the investigation. The incident has raised concerns about the possibility of infected people travelling along major transport routes and carrying the virus into areas farther from the outbreak’s epicentre.
For neighboring countries, this underlines the importance of maintaining border surveillance and laboratory readiness.
WHO and Africa CDC have specifically advised countries against unnecessary restrictions on travel or trade. Instead, they recommend stronger surveillance, preparedness and cross-border coordination.
What Health Authorities Are Doing Next
WHO and Africa CDC have called for several immediate measures to bring the outbreak under control. These include improving early case detection, raising contact follow-up to at least 95%, expanding testing and treatment services closer to communities and increasing laboratory and ambulance capacity.
They are also calling for better protection and timely payment of frontline health workers, stronger infection prevention in healthcare facilities and continued access to essential health services.
The organizations say response teams must also be able to safely reach communities affected by insecurity and poor infrastructure, while committed funding needs to reach frontline operations quickly.
WHO Director-General Tedros said the outbreak is outpacing the response in some parts of eastern DRC, making a rapid expansion of containment efforts necessary.
Why The Current Outbreak Is So Concerning
The scale of the outbreak is what makes the current situation particularly alarming.
With cases exceeding 4,000 and deaths approaching 1,800, the outbreak has become the second-largest Ebola outbreak on record, according to The Guardian. Its rapid growth is occurring against a backdrop of insecurity, limited healthcare access, population displacement and community mistrust.
The possibility of undetected transmission makes containment even harder. If infected people are not identified early and are not connected to treatment or surveillance systems, they can unknowingly expose family members, caregivers and other community members.
For health officials, the priority is therefore not simply treating those who are already sick. It is finding infections earlier, breaking chains of transmission and rebuilding trust between communities and response teams.
The Road Ahead
The DRC’s Ebola response has entered a critical phase. The country has experienced Ebola outbreaks before and has developed considerable expertise in managing the disease, but the current pace of transmission is testing those systems.
WHO and Africa CDC are now pushing for a response that reaches deeper into communities, rather than relying solely on treatment centres and traditional contact tracing.
Whether the virus has undergone changes that contribute to the outbreak’s severity remains an open scientific question. What is already clear, however, is that health authorities face a rapidly expanding emergency in which early detection, community trust, adequate healthcare capacity and sustained international support will be crucial to stopping transmission.
The experience of Uganda shows that containment remains possible. But in the DRC, health officials say the response must now move faster and closer to the communities where transmission is taking place.
References:
- Africa CDC and WHO call for urgent, community-led action to contain Ebola in the DRC – (https://www.who.int/news/item/06-08-2026-africa-cdc-and-who-call-for-urgent–community-led-action-to-contain-ebola-in-the-drc)
Source-Medindia