Cruise Ship Hantavirus Outbreak 2026: MV Hondius Docks in Tenerife

Three people are dead, a body is still aboard, and the MV Hondius has just docked in Tenerife.

A small ship, a long crossing, and a closed environment

The MV Hondius is a Dutch-flagged polar expedition cruise ship operated by Oceanwide Expeditions, a Netherlands-based company. It has 95 passenger cabins and a maximum capacity of 196 passengers and 72 crew, a passenger-to-crew ratio of roughly two to one. When it departed Ushuaia, Argentina, on April 1, 2026, on an Atlantic crossing toward Europe, there were 175 people on board.

That headcount matters because it is also the dimension of the outbreak. The Hondius was built for Antarctic and remote-ocean tourism, not for mass-market travel. The space is communal by design. Almost everyone aboard had already shared meals, lectures, and inflatable boat excursions for weeks by the time the first symptoms appeared on April 6, six days after departure from Ushuaia. Investigators now suspect the initial exposure happened just before boarding, likely during a local bird-watching excursion near the port. The leading transmission theory is that two Dutch passengers contracted Andes virus during that excursion in or near Ushuaia, then carried the infection aboard.

Hantaviruses normally spread through inhalation of dust contaminated with infected rodent droppings, urine, or saliva. The Andes strain is the exception, and that exception is exactly what made the Hondius dangerous. As Dr. Manuel Schibler of Geneva University Hospital put it, "The Andes virus is the only hantavirus for which human-to-human transmission has been documented." The Hondius gave a virus normally confined to rural Patagonian family clusters something it had never had before at sea: a confined population, several weeks together, and no easy way off.

The three deaths and a body that stayed aboard

The first death was Leo Schilperoord, a 70-year-old Dutch ornithologist, who died aboard the Hondius on April 11, 2026, as the ship moved north into the open Atlantic. By then the vessel was already too far from coastal medicine for routine evacuation. It continued its scheduled route through remote ports, stopping at Tristan da Cunha on April 13 to 15 and reaching Saint Helena on April 24.

About 30 passengers disembarked at Saint Helena on April 24, before the outbreak was understood. That disembarkation is the reason a contact-tracing effort is now underway in 22 countries, coordinating with passengers who left the ship before anyone knew what they might be carrying. The second death followed two days later. Mirjam Schilperoord, 69, Leo's wife, died on April 26, 2026, after a medical evacuation to Johannesburg.

The Hondius pushed on toward Ascension Island, calling there on April 27, then to Praia, Cape Verde, on May 3 to 6. A third passenger, a German woman, died aboard on May 2, 2026. There was no safe way to offload her remains at sea, and her body remained on the Hondius during the voyage to Spain. By May 8, 2026, after the Saint Helena disembarkations, 147 individuals were aboard. As of May 9, the outbreak had produced 6 confirmed Andes virus cases and 8 suspected cases in total, with 3 deaths confirmed during the voyage.

How the pathogen was identified

For more than a month, no one aboard knew exactly what they were dealing with. On May 4, 2026, the pathogen was confirmed as Andes virus by PCR testing on a passenger sample. The following day, the Centre for Emerging Viral Diseases at Geneva University Hospital, a World Health Organization collaborating centre, ran the identifying test and verified the result.

That confirmation is what changed the operation around the ship. Four medical experts from Amsterdam University Medical Center and the Central Military Hospital in Utrecht boarded the Hondius on May 6, 2026, and the vessel left the Cape Verde coast that same Wednesday, sailing north for Tenerife under medical supervision. The shift from an unexplained shipboard illness to a named, characterized pathogen is what allowed Madrid to plan a controlled arrival instead of an open-ended quarantine at sea.

Two virologists framed the public-health stakes in plain terms. "If they weren't on a cruise ship in a small container, then it wouldn't have supported itself in spreading," Dr. Scott Pegan of the University of California Riverside School of Medicine said. Dr. Marieke Rosenbaum of the Tufts University Cummings School of Veterinary Medicine made the same point from the opposite direction: "The risk of human-to-human transmission of hantavirus is really low, and this cruise was just like the perfect condition for it to spread." Christian Lindmeier, the World Health Organization spokesman, was blunter still: "The risk remains absolutely low. This is not a new COVID."

The lethality is not low. According to the U.S. Centers for Disease Control and Prevention, hantavirus pulmonary syndrome carries a case fatality rate of about 38 percent. The incubation window stretches from 1 to 8 weeks. Those two figures are why the contact-tracing effort across 22 countries is being run on a clock measured in months, not days.

Sunday in Tenerife: a biosecurity operation, not a port call

Fernando Clavijo, president of the Canary Islands, initially refused the ship permission to dock, citing pandemic-era memories. The Spanish Health Ministry overruled the regional refusal and approved the Hondius's controlled arrival. The ship reached the Port of Granadilla de Abona, on the south coast of Tenerife, on Sunday, May 10, 2026.

What unfolded on the dock was a biosecurity operation rather than a standard port call. Disembarkation was conducted ship-to-shore by speedboat in carefully sequenced waves to avoid contact with island residents. Spanish medical workers and military personnel wore full hazmat suits and FFP2 respirators while transferring passengers. Spanish emergency services chief Virginia Barcones said the passengers would be moved into a "completely isolated, cordoned-off area" of the port. From there, buses ran to Tenerife Sur Airport, where 7 evacuation flights departed on May 10, 2026.

The passengers split by nationality. The ship arrived with 13 Spanish passengers plus 1 Spanish crew member, about 17 Americans, and about 24 British nationals on board. Spanish nationals were sent to a military hospital in Madrid for quarantine and observation; foreign passengers boarded the sealed charter flights home. A French passenger began showing hantavirus symptoms during the repatriation flight to France on May 10, 2026, a reminder that the incubation window has not closed for anyone who was aboard.

What is left to play out

About 30 crew members will remain aboard and sail the Hondius to the Netherlands for disinfection after passenger evacuation, a skeleton crew handling the longest leg of the operation with the ship itself still in scope as a contaminated site. The contact-tracing effort across 22 countries is the slower, less visible half of the response; with an incubation window of 1 to 8 weeks, late cases among Saint Helena disembarkees or among repatriated passengers are exactly what investigators are watching for.

What the Hondius episode supplies, for the first time at this scale, is a real-world observation of something virologists had only modeled. A virus whose human-to-human transmission had previously been documented inside Patagonian family homes was placed in a closed maritime environment with shared meals, shared lectures, and shared excursion boats, and it behaved the way researchers had long suspected it would. The story ending on a Tenerife dock is also the start of a longer follow-up, one whose timeline is measured against an 8-week ceiling on incubation and a 38 percent ceiling on what this disease can do once it takes hold.

Sources

• MV Hondius hantavirus outbreak, Wikipedia
• Al Jazeera, 2026-05-10
• NPR, 2026-05-08
• News-Medical, 2026-05-08
• Fortune, 2026-05-08