WHO warns human-to-human spread of rat virus cannot be ruled out aboard stranded cruise ship

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, May 5, 2026 
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Three passengers are dead, at least seven others are infected, and a Dutch-flagged cruise ship carrying nearly 150 people sits stranded off the coast of Cape Verde, refused entry by local health authorities, as the World Health Organization now says it cannot rule out that a rare, rodent-borne virus spread directly between people on board.

The MV Hondius, operated by Oceanwide Expeditions, departed Ushuaia, Argentina, in March on a long-haul Atlantic voyage. What was supposed to be an expedition cruise has become a floating quarantine. And the WHO's admission that human-to-human transmission of hantavirus, a disease that kills roughly 35 percent of those it infects, according to CDC figures, may have occurred on board raises questions that no government involved has yet answered clearly.

Dr. Maria Van Kerkhove, the WHO's director for epidemic and pandemic preparedness and prevention, said Tuesday:

"Certainly, human-to-human transmission can't be ruled out, so, as a precaution, this is what we are assuming."

She added that the risk to the general public remained low, distinguishing hantavirus from respiratory pandemics. "This is not a virus that spreads like flu or like Covid. It's quite different," she said. But for the passengers and crew confined to their cabins aboard the Hondius, that distinction offers cold comfort.

Three dead in seven weeks at sea

The timeline of illness and death aboard the ship is grim. On April 11, a 70-year-old Dutch man died as the vessel steamed toward Tristan da Cunha. Three days later, his 69-year-old wife fell ill. She later died as well.

Oceanwide Expeditions said the Dutch man's body "was disembarked on St Helena, with his wife accompanying the repatriation" on April 24. Around the same time, a 69-year-old British passenger became seriously ill and was medically evacuated to South Africa. South African authorities confirmed that patient tested positive for hantavirus. That patient remains in a Johannesburg hospital.

On May 2, another passenger, a German national, died on board. That brought the death toll to three.

By Monday, the WHO said two infections had been confirmed and five more were suspected among seven total cases. Those seven include one patient in critical condition and three with mild symptoms. Oceanwide Expeditions said two crew members, one British, one Dutch, continued to show what the company called "acute respiratory symptoms," one mild and one severe, and required urgent medical care.

The ship has been stranded off Cape Verde after health authorities there refused to authorize docking at the Port of Praia. Passengers have been told to stay in their cabins while disinfection and control measures are carried out.

A ship with no port

The Hondius now sits in a kind of jurisdictional limbo. Cape Verde won't let it dock. Spanish authorities have not committed to receiving it at Las Palmas or Tenerife, despite initial reports suggesting the ship might head for the Canary Islands for WHO- and Dutch-supervised medical screening.

Van Kerkhove said the WHO was working with Spanish authorities to arrange a welcome for the ship. "We're working with Spanish authorities, who will welcome the ship," she said. But Spanish officials pushed back, saying no definitive decision had been made.

The Netherlands, whose flag the vessel sails under, said it was coordinating consular assistance for passengers, including those of other nationalities. Plans for a possible evacuation using two specialized aircraft have been discussed but not confirmed.

What's clear is that nobody on shore wants this ship. And nobody on board can leave.

Passengers plead for help

Ann Lane, a passenger from Donnybrook in south Dublin, told the Irish Times that the ship's own doctor, a British man she described as younger, had fallen ill after treating patients around the clock. "The doctor had been treating everybody day and night, really dedicated to what he was doing, [he has been] fabulous," Lane said. She estimated he had been sick since the previous Thursday. A member of the expedition staff was also ill, she said.

Jake Rosmarin, a Boston-based travel content creator with 44,000 Instagram followers, posted a tearful video from the ship on Tuesday. His plea cut through the clinical language of WHO bulletins.

"We're not just a story, we're not just headlines, we're people. People with families, with lives, with people waiting for us at home."

"There's a lot of uncertainty, and that's the hardest part," Rosmarin said. He asked anyone following coverage to remember "there are real people behind it, and that this isn't something happening far away. It's happening to us, right now."

Another passenger, Qasem Elhato, described a quieter but still anxious atmosphere. "Our days have been close to normal, just waiting for authorities to find a solution," Elhato said, as reported by the Washington Times.

A rare virus with a high fatality rate

Hantavirus is not a household name. In the United States, only one to two people die from it each year. Over the past three decades, roughly 1,000 infections have been registered in the country. The disease is typically contracted when humans inhale particles from the dried droppings of infected rodents, or are bitten or scratched by them. Symptoms usually appear within one to eight weeks of exposure.

But the CDC's fatality figure, about 35 percent of those infected, makes hantavirus far deadlier per case than many better-known pathogens. The rare nature of the pathogen is precisely what makes the Hondius situation so alarming to public health officials. Human-to-human transmission of hantavirus has historically been considered extremely uncommon. The WHO's decision to treat it as a working assumption aboard this ship marks a significant departure from the standard framing.

WHO officials said they suspected the first infected person likely contracted the virus before boarding the ship. That raises the question of whether the pathogen was brought aboard from Argentina, where the voyage began. Authorities have said it remains unclear whether initial patients were exposed before embarkation or on the vessel itself.

The Washington Examiner reported that South Africa's National Department of Health spokesman Foster Mohale urged calm, saying "there is no need for the public to panic." The WHO echoed that message while noting it would be "coordinating a multicountry response with all affected islands and countries to contain further spread of the disease."

Who is in charge?

The multinational nature of this crisis, a Dutch-flagged ship, an Argentine departure port, British and Dutch and German passengers, Cape Verdean and South African and Spanish jurisdictions, has created a patchwork of authority with no clear lead. The WHO is involved but does not command sovereign ports. The Netherlands is coordinating consular help but does not control the ship's itinerary. Cape Verde has simply said no.

The voyage included stops at Antarctica-related sites, the Falkland Islands, Saint Helena, and Ascension Island before heading toward Spain's Canary Islands, Newsmax reported. That long route through remote waters meant the ship was far from major medical infrastructure when the first death occurred.

Detailed investigations are ongoing, the WHO said, including further laboratory testing and epidemiological work. But the pace of those investigations has not kept up with the pace of illness. Three people died over a span of three weeks. The ship still has no confirmed destination.

Situations like this, where ordinary people find themselves trapped in unfolding emergencies while institutions deliberate, test whether the international systems we've built actually work when lives hang in the balance.

Open questions that demand answers

Several facts remain unknown. Where exactly did the outbreak originate, on shore in Argentina or aboard the ship? If human-to-human transmission occurred, what was the mechanism? Will the planned evacuation with specialized aircraft go forward? And when will the nearly 150 souls aboard the Hondius finally reach solid ground?

The WHO has said the right reassuring words. South African health officials have urged calm. Oceanwide Expeditions has issued statements. But the passengers, isolated in their cabins, watching crew members fall sick, waiting for governments to decide who will accept them, are living with the consequences of a system that moves slowly while a virus does not.

When danger strikes without warning, people expect their governments and institutions to act with speed and clarity. The passengers aboard the MV Hondius are still waiting for both.

International health bureaucracies are very good at issuing reassurances from shore. The test is whether they can get people off a ship.

About Jack Newsome

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