You may have seen recent headlines about a hantavirus outbreak linked to a cruise ship in May 2026, and understandably, the word ‘virus’ in the news can feel unsettling. At Prema Health, we believe that clear, accurate information is one of the most powerful tools for your wellbeing. So let’s look at what hantavirus actually is, how it spreads, and — importantly — why the risk to most people in the UK remains very low.
What is hantavirus?
Hantavirus is a group of viruses carried primarily by rodents, particularly mice and rats. It has been known to science for decades and exists in several forms around the world. The two main diseases it can cause in humans are Hantavirus Pulmonary Syndrome (HPS), which primarily affects the lungs and is more common in the Americas, and Haemorrhagic Fever with Renal Syndrome (HFRS), which affects the kidneys and is more common in Europe and Asia.
It is not a new virus, and it is not a novel pathogen in the way that COVID-19 was. Researchers and public health authorities understand it well.
How does hantavirus spread?
This is perhaps the most important thing to understand: hantavirus is not spread from person to person. You cannot catch it from another human being in the way you might catch a cold or flu.
Transmission occurs almost exclusively through contact with infected rodents or their droppings, urine, or saliva. The most common route of infection is breathing in tiny airborne particles — known as aerosols — when dried rodent droppings or nesting materials are disturbed. This can happen when cleaning out a shed, barn, or outbuilding that has had rodent activity, or in environments where rodents are present.
In very rare cases, transmission can occur through a rodent bite, or by touching contaminated surfaces and then touching the mouth or nose. Eating food contaminated by infected rodents is also a theoretical route.
What about the recent cruise ship outbreak?
Reports in May 2026 linked a small number of hantavirus cases to individuals who had been on a cruise ship. Investigations focused on potential rodent activity aboard the vessel, which — while unusual — is not impossible in large ships with complex storage and food handling areas. Public health authorities moved quickly to investigate and contain the situation.
It is worth emphasising that the number of confirmed cases was small, and there was no evidence of person-to-person transmission. The outbreak served as a reminder of the importance of rodent control in all environments, including those we might not immediately associate with wildlife.
What are the symptoms of hantavirus?
Symptoms of hantavirus infection typically appear between one and eight weeks after exposure. Early symptoms can be easy to mistake for other illnesses and may include fatigue, fever, and muscle aches — particularly in the thighs, hips, and back. Some people also experience headaches, dizziness, chills, and stomach problems such as nausea, vomiting, or diarrhoea.
In cases that progress to Hantavirus Pulmonary Syndrome, these early symptoms are followed by coughing and shortness of breath as the lungs fill with fluid. This is the more serious form of the disease and requires urgent medical attention.
HFRS, the form more common in Europe, typically causes intense headaches, back and abdominal pain, fever, chills, nausea, and blurred vision, followed by low blood pressure and kidney problems in more severe cases.
What is the risk for people in the UK?
Cases of hantavirus in the UK are rare. The strain present in the UK, carried by bank voles and wood mice, can cause a milder form of HFRS, but serious illness is uncommon. The vast majority of people in the UK will never come into contact with hantavirus, particularly those living in urban areas with limited exposure to rural or woodland environments.
If you are concerned following recent news coverage, please be reassured that the UK’s public health infrastructure monitors hantavirus carefully, and there is no evidence of widespread risk to the general population at this time.
When should you see a doctor?
If you have been in an environment with rodent activity — particularly in rural, woodland, or agricultural settings — and develop a fever, severe muscle aches, or unexplained breathing difficulties in the weeks that follow, it is worth seeking medical advice promptly. Early assessment makes a genuine difference.
At Prema Health, our private GP services in Portsmouth and Hampshire are here to offer fast, thorough consultations without the long waits. Whether you have a specific concern following recent news or simply want peace of mind, our team will take the time to listen, assess, and guide you with care. Same-day and next-day appointments are available — because when something is worrying you, you shouldn’t have to wait.