Hantavirus: What it is and how to stay safe while travelling and staying overnight

Based on the recent outbreak of the virus on the MV Hondius, a cruise ship with 148 passengers. Three passengers have died, while two confirmed cases and five suspected cases of hantavirus have been identified.

After the Covid-19 era of self-isolation and social distancing, any virus that comes from an animal source is likely to cause widespread anxiety and panic. This is starting to be the case with hantavirus, a potentially life-threatening rodent-borne disease.

“Hantavirus” isn’t a single disease, but a loose way people describe infections spread by rats—some viral, some bacterial—that can cause serious illness in humans. Here’s what you actually need to know, how it spreads, and practical steps to protect yourself at home and outdoors.

When people say “rat-virus,” they’re usually talking about illnesses that come from rats or their urine, droppings, saliva, or bites. It’s not one specific virus with one neat medical name. Instead, it’s a group of infections that can include things like Leptospirosis, hantavirus infections, and rat-bite fever. The term gets used casually online and in conversation, but medically it’s a bit messy.

The important thing to understand is this: rats themselves aren’t “dirty monsters,” but they can carry organisms that are harmful to humans. And because rats live close to people in cities, farms, basements, and sewers, exposure is more common than most people think.

Let’s break it down in a practical way—what these infections are, how people catch them, and what you can realistically do to avoid them while travelling around, staying overnight especially in resorts, hotels, cruises, Airbnb's and where ever you choose to stay.

What “Rat-virus” usually refers to

1. Leptospirosis (one of the most common)

This is probably the biggest culprit behind what people call “rat-virus.” It’s caused by bacteria spread in rat urine. The bacteria can survive in water or wet soil for weeks.

You can get infected if:

• You touch water or soil contaminated with rat urine

• The bacteria enters through cuts or scrapes

• Contaminated water gets into your mouth, eyes, or nose

It can feel like flu at first—fever, headache, muscle pain—but in severe cases it can affect the liver and kidneys

2. Hantavirus

Hantaviruses are carried by some rodents and spread through inhaling dust contaminated with droppings or urine. It can cause serious respiratory illness. It’s rare, but it gets attention because it can become severe quickly.

3. Rat-bite fever

This is a bacterial infection that can spread through bites, scratches, or even handling rodents. It’s less common in everyday city life but still possible in environments with infestations or pet rodents.

So when someone says “rat-virus,” they’re usually mixing together several rodent-linked illnesses into one simple label.

How people actually get infected

Most infections don’t come from direct contact with a rat. That’s the surprising part. You’re more likely to get exposed indirectly.

Common routes include:

• Cleaning up rat droppings without protection

• Walking through floodwater contaminated with sewage

• Handling food or utensils that rats have accessed

• Gardening in soil where rodents have been active

• Breathing in dust in enclosed spaces like sheds or basements

• Being bitten or scratched (less common but higher risk)

This means you don’t need to touch a rat to be at risk. Environment matters more than the animal itself.

Who is at higher risk?

Anyone can get exposed, but some groups are more vulnerable:

• People living in older housing with pest issues

• Workers in sewers, agriculture, or waste management

• Campers or hikers in rodent-heavy areas

• People cleaning attics, basements, or sheds

• Pet owners with rodents if hygiene is poor

• Individuals in flood-prone areas

Again, it’s not about panic—it’s about awareness.

Symptoms to watch for

Because “rat-virus” isn’t one disease, symptoms vary. But there are common warning signs:

• Fever and chills

• Muscle aches (especially calves or lower back in leptospirosis)

• Headache

• Fatigue

• Nausea or vomiting

• Red eyes (sometimes in leptospirosis)

• Cough or breathing difficulty (in more severe hantavirus cases)

If someone has been exposed to rodent-contaminated environments and develops flu-like symptoms, it’s worth seeking medical advice early. Early treatment makes a big difference.

Practical steps to stay safe

This is the part that actually matters day-to-day. You don’t need extreme precautions—just consistent hygiene and basic prevention.

1. Control rodent access

• Seal holes in walls, floors, and pipes

• Keep food in airtight containers

• Don’t leave pet food out overnight

• Dispose of rubbish regularly

• Fix leaking pipes (rats are drawn to water)

If rats can’t get in easily, risk drops dramatically.

2. Clean safely (very important)

If you find droppings or urine:

• Do NOT sweep or vacuum dry droppings (this can aerosolise particles)

• Wear gloves and, if possible, a mask

• Spray disinfectant or bleach solution first

• Let it soak before wiping

• Wash hands thoroughly afterwards

This is one of the simplest but most ignored safety steps.

3. Protect yourself outdoors

• Avoid wading in floodwater if possible

• Wear waterproof boots and gloves in muddy or contaminated areas

• Cover cuts or wounds before outdoor work

• Wash hands before eating or touching your face

4. Food hygiene matters more than people think

• Store food in sealed containers

• Clean kitchen surfaces regularly

• Don’t leave crumbs or uncovered food overnight

• Check packaging for signs of gnawing in storage areas

Rats follow food sources. Remove the incentive, and they leave.

5. If you suspect infestation, act early

Small infestations become big ones quickly. If you see signs like droppings, scratching sounds, or damaged packaging:

• Contact pest control early

• Don’t rely on DIY fixes alone for severe infestations

• Keep children and pets away from affected areas

What to do if you think you’ve been exposed

If you’ve cleaned an area with droppings or been in a contaminated environment:

• Wash hands and exposed skin immediately

• Monitor for symptoms over the next 1–3 weeks

• Don’t ignore fever or unusual muscle pain

• Seek medical advice and mention possible rodent exposure

Doctors don’t treat “rat-virus” as a single condition—they’ll consider the likely specific infection and test accordingly.

The big picture (and calming reality check)

It’s easy to overthink this topic because the phrase “rat-virus” sounds dramatic. In reality, serious infections are relatively uncommon when basic hygiene is followed. Most cases occur in situations where people are exposed repeatedly or don’t realise they’re handling contaminated environments.

Rats are a public health concern mainly because they live close to human infrastructure—not because casual exposure guarantees illness.

The real risk reduction comes down to three things:

• Keep rats out of living spaces

• Clean safely and properly

• Don’t ignore symptoms after exposure

Final thought

“Hantavirus” isn’t one disease—it’s a shorthand for a group of rodent-borne infections. The good news is that prevention is very practical and mostly about cleanliness, food storage, and sensible handling of contaminated areas.

You don’t need fear. You just need habits that reduce contact between you and rodent waste—and that alone cuts the risk massively.

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