Hantavirus outbreak on MV Hondius kills three, WHO investigates human-to-human transmission

Key facts

• Three passengers have died: a Dutch couple and a German national.
• Seven cases identified: two laboratory-confirmed, five suspected.
• A 69-year-old British tourist is in intensive care in Johannesburg, critical but stable.
• A British crew member and a Dutch crew member show acute respiratory symptoms, one severe.
• The ship, MV Hondius, departed Ushuaia, Argentina in March with 149 people from 23 countries.
• WHO says human-to-human transmission cannot be ruled out due to close contact among cases.
• The ship is currently off the coast of Cape Verde; disembarkation point not finalized.

Lede: Deaths and evacuations as hantavirus hits luxury cruise

Three people have died and at least four others have fallen ill in a suspected hantavirus outbreak aboard the MV Hondius, a luxury cruise ship now stranded off the coast of Cape Verde with 149 passengers and crew from 23 countries. The World Health Organization confirmed Monday that seven cases — two laboratory-confirmed and five suspected — have been identified, including three fatalities: a married couple from the Netherlands and a German national. A 69-year-old British tourist remains in intensive care in Johannesburg, described as critical but stable, while two crew members, one British and one Dutch, are showing acute respiratory symptoms and require urgent medical evacuation.

Timeline of the outbreak: from first death to WHO alert

The MV Hondius set sail from Ushuaia, Argentina in March on a transatlantic voyage scheduled to visit remote islands. On April 11, the first passenger, a Dutch national, died onboard; the cause was not determined at the time. He was disembarked on St Helena on April 24, accompanied by his wife. Days later, his wife, also Dutch, collapsed at an airport in South Africa while attempting to return to the Netherlands and died at a nearby hospital. On April 27, a British passenger became seriously ill and was evacuated to South Africa, where hantavirus was later identified. The crisis escalated late Sunday when the WHO announced it was investigating a suspected outbreak, and by Monday the agency had linked the deaths to hantavirus.

Human-to-human transmission suspected by WHO

Dr. Maria Van Kerkhove, WHO’s Director for Epidemic and Pandemic Preparedness and Prevention, told reporters Tuesday that human-to-human transmission may have occurred onboard. “We do know that some of the cases had very close contact with each other and certainly human-to-human transmission can’t be ruled out so as a precaution this is what we are assuming,” she said. Hantavirus is typically spread through contact with infected rodents’ urine, faeces or saliva, and person-to-person transmission is rare but has been documented in some strains. Van Kerkhove emphasized that the risk to the general public remains low: “This is not a virus that spreads like flu or like COVID. It’s quite different.”

Passengers and crew in limbo as ship waits for port

The MV Hondius remains off the coast of West Africa, with no final disembarkation point confirmed. The cruise operator, Oceanwide Expeditions, said the ship may continue to Las Palmas or Tenerife, but no decision has been finalized. Among those stranded are 17 American passengers, along with mostly British and Spanish nationals. A US travel blogger onboard, Jake Rosmarin, posted a tearful video on social media: “We’re not just headlines: we are 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.” The company stated that two crew members — one British, one Dutch — continue to show acute respiratory symptoms, one mild and one severe, and require urgent medical care.

Background: what is hantavirus and why this outbreak is unusual

Hantavirus is a rare viral disease primarily found in rodents, causing severe respiratory illness in humans. Infection occurs through inhalation of aerosolized virus from rodent excreta, or through direct contact. The disease can progress rapidly, with symptoms including fever, muscle aches, and shortness of breath. Outbreaks on cruise ships are extremely uncommon; the confined environment and close quarters may have facilitated transmission. The WHO has linked the deaths to hantavirus, but the specific strain involved has not been publicly identified. The British patient in Johannesburg was found to have “a variant of hantavirus,”.

Outlook: medical evacuations and next steps

Medical evacuation of the two ill crew members is currently underway, Dr. Van Kerkhove said Tuesday. The British passenger in intensive care is reportedly improving. The remaining passengers and crew face an uncertain wait as authorities determine where the ship can dock. The WHO continues to monitor the situation, and the risk assessment for the general public remains low. The incident has raised questions about cruise ship health protocols and the challenges of managing rare infectious diseases in isolated maritime settings.

The bottom line

• Seven hantavirus cases (two confirmed, five suspected) have been linked to the MV Hondius, with three deaths.
• WHO has not ruled out human-to-human transmission, a rare occurrence for hantavirus.
• A British tourist remains in intensive care in South Africa; two crew members need urgent evacuation.
• The ship is stranded off Cape Verde with 149 people; disembarkation point not yet finalized.
• The outbreak began in April with the death of a Dutch passenger; his wife died days later in South Africa.
• The risk to the general public is low; hantavirus does not spread easily like flu or COVID-19.