It doesn’t make the headlines as often as COVID or Ebola, but Marburg virus is arguably more dangerous than either. With a kill rate that can reach 88% and no approved vaccine or cure, it sits near the very top of the world’s most feared pathogens. And it’s been making a quiet comeback.
Here’s what you need to know about where it came from, how it spreads, and why it matters.
Where Did Marburg Come From?
The story starts in 1967, in a German laboratory. Workers in the cities of Marburg and Frankfurt — and simultaneously in Belgrade, in what is now Serbia — began falling seriously ill. The connection? All of them had been handling African green monkeys imported from Uganda for research purposes.
The illness that followed was brutal. Fever, haemorrhaging, organ failure. Scientists had never seen anything like it. When they isolated the cause, they named it after the German city where it was first identified: Marburg virus.
It was one of the first haemorrhagic fever viruses ever discovered, and it set an uncomfortable precedent. Here was a virus that had crossed from animals to humans in a controlled laboratory setting — and killed people with terrifying efficiency.
What Kind of Virus Is It?
Marburg belongs to the Filoviridae family — the same family as Ebola. That’s not a coincidence in terms of how it behaves. Both cause severe haemorrhagic fever, both are transmitted through bodily fluids, and both have high fatality rates.
The natural reservoir of Marburg is the Egyptian fruit bat (Rousettus aegyptiacus). These bats carry the virus without becoming ill themselves. Humans typically pick it up through direct contact with bat blood, tissue, or bodily fluids — often by entering caves or mines where the bats roost.
Once it’s in a human population, it spreads person to person.
How Does It Spread Between People?
This is the key question for anyone thinking about preparedness, and the honest answer is: not easily — but lethally when it does.
Marburg is not airborne. You cannot catch it by breathing the same air as an infected person. That’s an important distinction and one that limits how far it can spread in controlled environments.
What it does require is direct contact with the blood or bodily fluids of someone who is infected and symptomatic. That includes blood, saliva, vomit, urine, faeces, sweat, and breast milk. Touching contaminated surfaces, clothing, or medical equipment is also a transmission route.
Healthcare workers have historically been among the most vulnerable, particularly in healthcare settings where infection control measures weren’t in place. The virus can also be transmitted through the semen of a recovered male patient for up to seven weeks after recovery.
Importantly, people cannot pass on the virus during the incubation period — they have to be showing symptoms first.
What Are the Symptoms?
The incubation period is typically 2 to 21 days. When symptoms arrive, they arrive fast.
Early stage (Days 1–5):
- Sudden high fever
- Severe headache
- Muscle aches and fatigue
- General feeling of being very unwell
At this stage it can easily be mistaken for malaria, typhoid, or a bad flu.
Middle stage (Days 5 onwards):
- Severe diarrhoea, abdominal cramps, nausea, and vomiting
- A characteristic non-itchy rash on the chest, back, or stomach
- Confusion, aggression, and disorientation — the virus affects the brain
Late stage (Days 7–9):
This is where Marburg becomes unlike almost anything else. Massive bleeding from multiple sites — the eyes, nose, gums, and in some cases injection sites — along with organ failure. Many patients who die do so within 8 to 9 days of the first symptoms appearing.
There is no approved treatment. Supportive care — fluids, symptom management, monitoring — is all that’s currently available. Early, high-quality supportive care does improve survival rates, but it’s not a cure.
The Outbreak History
Since 1967, Marburg has caused a series of outbreaks across sub-Saharan Africa, each one a reminder that this virus hasn’t gone anywhere.
Angola, 2004–2005 — The deadliest Marburg outbreak on record. A case fatality rate of 88%. Over 250 people died. The virus spread rapidly through a paediatric ward before the outbreak was identified, partly because the early symptoms were mistaken for other diseases.
Democratic Republic of Congo, 1998–2000 — Linked to gold miners working in a cave with bat colonies. A grim pattern that would repeat itself in later outbreaks.
Uganda, 2008 — Two independent cases in separate travellers who had both visited the same cave system inhabited by Rousettus bats. Both died.
Ghana, 2022 — Ghana’s first ever confirmed Marburg outbreak, with three deaths from four confirmed cases.
Equatorial Guinea & Tanzania, 2023 — Multiple deaths, including 100% fatality rates in the Tanzanian cases.
Rwanda, 2024 — Rwanda’s first ever outbreak. 58 confirmed cases and 13 deaths before it was declared over in December 2024.
Tanzania, January 2025 — A second outbreak, again in the Kagera region, with a 100% case fatality rate among confirmed cases.
Ethiopia, November 2025–January 2026 — Ethiopia’s first ever Marburg outbreak. 14 confirmed cases, 9 deaths (a fatality rate of 64%). The outbreak was declared over in January 2026.
The pattern is clear: Marburg is not a historical curiosity. It is an active and recurring threat.
What Is the Risk to People in the UK?
The honest answer is: currently low, but not zero.
Marburg does not spread through casual contact or airborne transmission, which makes pandemic-level spread far less likely than with respiratory viruses like COVID-19. The outbreaks to date have largely been contained within Africa, and the WHO has consistently rated the global risk as low during each outbreak.
However, a few things are worth keeping in mind:
International travel. The 2008 Uganda cases both involved international travellers who became infected in caves and then returned home. Modern air travel means a person can be exposed in Africa and land in London before they’ve shown a single symptom.
No vaccine. At the time of writing, there is no approved vaccine for Marburg, though several candidates are in development. This means that if a large-scale outbreak occurred, the response would rely entirely on containment, isolation, and supportive care.
Healthcare system vulnerability. History shows repeatedly that healthcare workers are at high risk during outbreaks. In a scenario where Marburg reached a country with less robust infection control, spread within medical settings could occur before the disease was identified.
Increasing frequency. The number of countries reporting their first-ever Marburg outbreaks is rising. Ghana, Rwanda, Ethiopia — all in the last four years. This suggests either broader geographic spread or better detection, possibly both.
What Can You Do?
For the vast majority of people in the UK, day-to-day risk from Marburg is negligible. But for people who are interested in preparedness — and if you’re reading this site, that includes you — a few things are worth thinking about.
Stay informed. The WHO publishes real-time outbreak updates. Knowing where active outbreaks are is the first step.
Travel awareness. If you are travelling to sub-Saharan Africa, be aware of active outbreaks in the region. Avoid caves and mines known to harbour bat colonies. This is the most common initial exposure route.
Understand the transmission routes. Marburg is not airborne. It spreads through direct contact with bodily fluids. The same general hygiene and infection control principles that apply to Ebola apply here: avoid contact with blood and fluids, use appropriate protective equipment in healthcare settings, and be cautious in communities where an outbreak is occurring.
Support for a robust response. The best defence against diseases like Marburg is a strong global public health infrastructure — rapid detection, rapid containment, and coordinated international response. Rwanda’s 2024 outbreak was handled relatively well compared to Angola in 2005. The difference was speed and resources.
The Bottom Line
Marburg virus is not going to cause a global pandemic in the way COVID-19 did — its transmission route is too specific for that. But it is a genuine and growing threat in parts of the world, with a kill rate that makes most other infectious diseases look manageable by comparison.
What it represents, more broadly, is a reminder that the natural world contains pathogens of extraordinary lethality, and that the line between an isolated outbreak and an international incident is thinner than we might like. The 2008 Uganda cases showed a virus named after a German city turning up in travellers on another continent.
Preparedness isn’t about panic. It’s about paying attention. And Marburg is worth paying attention to. Get The Book – Preparing for Lockdown