Hantavirus outbreak aboard a cruise ship highlights serious health risks.
Image: Daniel Dan / Pexels.
Searches for “hantavirus symptoms", "how does hantavirus spread", and “is hantavirus contagious”, are climbing right now and for good reason.
The virus is rare, but when it shows up, it’s serious.
Following a tragic outbreak aboard the MV Hondius polar cruise ship this week, which left three dead and a British traveller fighting for their life in a South African ICU, the world is waking up to the reality of hantavirus.
According to the CDC (Centers for Disease Control and Prevention), Hantavirus is a serious, often fatal, rodent-borne virus that causes severe respiratory or kidney disease in humans.
It is primarily transmitted when dried urine, saliva, or droppings from infected mice or rats are stirred up, creating airborne particles that are inhaled.
The two faces of Hanta: In the Western Hemisphere, we deal with Hantavirus Pulmonary Syndrome (HPS). It’s a severe, often fatal respiratory disease.
In Europe and Asia, the virus more commonly manifests as haemorrhagic fever with renal syndrome (HFRS), which takes aim at your kidneys.
"Rapid, coordinated action is critical to contain risks and protect public health," warns WHO chief Tedros Adhanom Ghebreyesus via X, following the recent cruise ship cluster.
The danger of Hantavirus lies in its camouflage.
The early signs feel like a standard bout of the flu, making it a nightmare to diagnose.
• The early phase (1-8 weeks post-exposure): Expect fatigue, fever and deep muscle aches in the "big groups", thighs, hips and back.
• The "halfway" markers: About 50% of patients get hit with dizziness, chills, and "gut" issues like nausea or vomiting.
• The turning point: Four to ten days later, the late symptoms arrive like a freight train. We’re talking coughing, shortness of breath and a terrifying feeling of tightness in the chest as the lungs fill with fluid.
That last part is key. When contaminated dust gets into the air, and you breathe it in, that’s the most common way people are infected.
About 38% of people who develop serious breathing symptoms may die, according to the Centers for Disease Control and Prevention.
Hantavirus can lead to two major illnesses:
For HFRS, symptoms can also include blurred vision, low blood pressure, internal bleeding, and, in severe cases, kidney failure. Recovery, if you get through the critical phase, can take weeks to months.
Hantaviruses are a collection of viruses predominantly carried by rodents such as mice and rats.
Image: Boys in Bristol/Pexels
This is where people get confused. It is not spread person-to-person. The risk comes from rodent exposure, especially the following:
Even a bite or scratch can transmit it, but that’s less common.
There’s also a warning around pet rodents. Households with young children, pregnant women, or people with weakened immune systems are advised to be cautious.
There is no specific cure for hantavirus. Treatment focuses on supportive care:
Early medical attention improves outcomes, which is why recognising symptoms matters.
How to protect yourself (this is the practical part). If there’s one takeaway, it’s this: avoid contact with rodents and clean safely.
The main strategy is simple: control rodents and reduce exposure.
Hantavirus is rare, but it’s not something to ignore. It doesn’t spread like the flu or COVID-19, but when exposure happens, it can be severe.
If you’ve been cleaning out spaces, dealing with rodents, or noticing symptoms that don’t feel like a normal flu, it’s worth taking seriously.