7th Hantavirus Case Confirmed: Everything You Need to Know About the Cruise Ship Outbreak

A rare, deadly virus. A remote ocean voyage. And a rapidly evolving international response spanning more than a dozen countries. Here's a full, up-to-date breakdown of the hantavirus outbreak aboard the MV Hondius — what happened, where things stand right now, and what it means for you.

What's Happening Right Now (May 11, 2026)

The situation is moving fast. As of today:

10 total cases — confirmed and probable — have been linked to the cruise ship MV Hondius
3 people have died, two confirmed from hantavirus, one still under investigation
An American passenger has tested positive for the virus — the first U.S. case linked to the outbreak — and has been transported to the Nebraska Biocontainment Unit in Omaha
17 U.S. citizens were repatriated on a specialized charter flight that landed at Eppley Airfield in Omaha, Nebraska, earlier today
France has identified 22 contact cases among people who shared flights with infected passengers; one French passenger deteriorated on their repatriation flight and is now hospitalized
Passengers across the UK, Switzerland, Germany, Netherlands, and Spain are also being monitored or treated

The ship itself arrived in Tenerife, Canary Islands on May 6, where passengers began disembarking and flying home.

The Ship, the Route, and the Timeline

The MV Hondius departed Ushuaia, Argentina on April 1, 2026, carrying 147 passengers and crew from 23 countries. The expedition itinerary covered some of the planet's most remote corners:

Antarctica
South Georgia Island
Tristan da Cunha
Nightingale Island
Saint Helena
Ascension Island

Here's how the outbreak unfolded:

April 6 — A 70-year-old Dutch man develops fever, headache, abdominal pain, and diarrhea. He goes into respiratory distress on April 11 and dies aboard the ship. He is considered a probable case; no microbiological testing was performed in time.

April 24 — His 69-year-old wife goes ashore at Saint Helena with gastrointestinal symptoms. She flies to Johannesburg, deteriorates on the plane, and dies on April 26 at a hospital. She is later PCR-confirmed as a hantavirus case on May 4.

April 28 — A German woman develops fever and malaise, progresses rapidly to pneumonia, and dies on May 2 aboard the ship.

Late April/Early May — The ship's doctor and a ship guide both develop symptoms and test positive for the Andes virus on May 6. Both are evacuated to the Netherlands, where they are in stable condition.

May 1 — A passenger who had disembarked at Saint Helena and traveled to Switzerland via South Africa and Qatar reports symptoms, isolates himself, and tests positive on May 5. He is in a Swiss hospital.

May 6 — WHO confirms the virus responsible is the Andes virus. The ship departs for Tenerife.

May 8 — Total cases reach 8 (6 confirmed, 2 probable).

May 11 — American passengers land in Nebraska. Total cases rise to 10. One American tests positive, asymptomatic, and enters biocontainment.

What Is Hantavirus — And Why Is This Strain Different?

Hantavirus is a family of viruses spread primarily by rodents. Humans are typically infected by inhaling particles from infected rodent urine, droppings, or saliva. Under normal circumstances, it does not spread between people.

The Andes virus is the exception.

It is the only known strain of hantavirus capable of human-to-human transmission — and that's what makes this outbreak so unusual. Spread requires close, sustained contact with an infected person's respiratory secretions, saliva, or body fluids. It is not airborne in the way COVID-19 or flu is, and large-scale community spread remains unlikely.

When Andes virus does cause disease, it leads to Hantavirus Pulmonary Syndrome (HPS) — a severe, rapidly progressing illness that attacks the lungs. Symptoms typically appear 4 to 42 days after exposure and begin with:

Fever and chills
Muscle aches — especially in the thighs, hips, and back
Fatigue
Nausea, vomiting, or diarrhea

Within days, some patients progress to:

Shortness of breath
Coughing
Acute respiratory distress
Organ failure and shock

There is no specific antiviral treatment. Patients receive supportive care — rest, hydration, oxygen, and in severe cases, mechanical ventilation. The CDC reports that up to 38% of patients who develop respiratory symptoms may die from the disease.

How Did It Spread on the Ship?

The leading hypothesis, according to Argentine investigators, is that the index case contracted the virus before boarding. The Dutch man who first fell ill had completed a four-month road trip through Chile, Uruguay, and Argentina, returning from Uruguay just four days before the ship departed on April 1. Argentine health authorities are currently trapping and testing rodents along his travel route.

Once on board, the Andes virus appears to have spread to at least some passengers and crew through close person-to-person contact — the ship's doctor's infection being a clear indicator of this. The ship's confined quarters, extended voyage, and shared spaces all contributed.

What Are Authorities Doing?

The international response has been rapid and wide-ranging:

WHO is coordinating with health authorities across the UK, Netherlands, South Africa, Spain, Cabo Verde, and beyond
The CDC issued a Health Alert Network advisory (HAN00528) alerting U.S. clinicians to the risk of imported cases, while stressing that the risk to the broader public is extremely low. The CDC has classified its response at Level 3 — its lowest emergency activation tier
The Nebraska Biocontainment Unit is receiving the American passenger who tested positive. The remaining U.S. passengers are being held at the National Quarantine Unit for assessment and monitoring
France is monitoring 22 contact cases on two flights and has hospitalized one symptomatic passenger
Switzerland, UK, Spain, and Germany are conducting contact tracing and treating evacuated patients
Argentina is running an active rodent-trapping and epidemiological investigation at the source

Should You Be Worried?

The short answer: no — but stay informed.

Every major health authority — WHO, CDC, ECDC — has assessed the global risk as low. Here's why:

Hantavirus does not spread through casual contact or shared air in normal settings
Andes virus person-to-person spread requires close, sustained contact with body fluids — not a handshake or sharing a room
There is no evidence of community transmission outside the ship
The one asymptomatic American who tested positive is in biocontainment — not in a hospital ward or at home

That said, because the incubation period stretches up to 8 weeks, additional cases from passengers who disembarked early may still surface. Health officials are monitoring hundreds of contacts across more than a dozen countries.

Key Facts at a Glance

Detail	Information
Virus strain	Andes virus (hantavirus)
Ship	MV Hondius (Dutch-flagged, Oceanwide Expeditions)
Departure	Ushuaia, Argentina — April 1, 2026
Passengers & crew	147 from 23 countries
Total cases (May 11)	10 (confirmed + probable)
Deaths	3
Case fatality rate (HPS)	~38% in symptomatic patients
Transmission	Rodents; rare human-to-human (Andes only)
Treatment	Supportive care only
Global risk level	Low (WHO, CDC)
U.S. cases	1 confirmed (asymptomatic, in biocontainment)

What to Do If You Were on the Ship — or Near Someone Who Was

If you or someone you know was aboard the MV Hondius — or in close contact with a passenger after disembarkation — contact your local health authority immediately, even if you feel completely fine. The incubation window means symptoms may still be weeks away.

Watch for:

Sudden fever
Muscle aches
Fatigue
Any respiratory symptoms, however mild

Early medical care is critical. Do not wait.

The Bigger Picture

This outbreak is a sharp reminder that infectious diseases do not respect borders — or expedition itineraries. A virus carried by rodents in South America has now touched patients in South Africa, Switzerland, the Netherlands, Germany, the UK, France, and the United States. The world responded swiftly, coordinating across more than a dozen countries within days of the first WHO notification.

The Andes virus remains rare. Large-scale spread remains unlikely. But the MV Hondius outbreak has shown, once again, how quickly a single exposure in a remote location can ripple into an international public health event — and how essential rapid global surveillance is in containing it.

We'll keep updating this page as the situation develops. Bookmark it and check back.

Last updated: May 11, 2026

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