Hantavirus Cruise Ship Outbreak Kills Three — Officials Identify Likely Origin

Three Dead After Rare Virus Outbreak on Cruise Ship — and 12 Countries Are Now on Alert
Three passengers are dead and health officials across a dozen countries are monitoring hundreds of people after a rare and potentially fatal virus broke out aboard a cruise ship registered under the flag of the Netherlands. The outbreak, caused by a strain of hantavirus called the Andes virus, has prompted an international public health response that is still actively unfolding.
What Happened on the M/V Hondius
The death toll from the hantavirus outbreak that erupted aboard the cruise ship currently stands at three, with nine individuals confirmed infected.
The ship — the M/V Hondius, operated by Oceanwide Expeditions — is an expedition-style vessel that takes passengers to remote destinations. Oceanwide Expeditions confirmed that no passengers or crew members currently on the ship are showing signs of illness, though experts warn the outbreak investigation is still ongoing.
The situation came to international attention as passengers who had already disembarked spread across multiple countries, making contact tracing a complex, multinational operation.
What Is the Andes Virus — and Why Is It Different
Hantaviruses are a rare group of viruses typically transmitted through contact with infected rodent droppings, urine, or saliva. According to the Centers for Disease Control and Prevention, these viral infections can lead to severe pulmonary complications.
The strain identified aboard the M/V Hondius is known as the Andes virus — the only hantavirus currently known to spread from person to person, with transmission generally requiring prolonged close contact. Every other known strain of hantavirus requires direct exposure to infected rodents. This distinction is what makes the Andes virus particularly concerning to public health officials and why it triggered such a rapid international response.
Where Officials Think It Started
Health officials investigating the outbreak believe they may have identified where the infection began — during a birdwatching excursion near a landfill site in Ushuaia, the southernmost city in Argentina.
According to an Associated Press report citing Argentine officials, investigators believe a Dutch couple may have contracted the virus during a visit to an area near Ushuaia’s landfill site, which reportedly had a large rodent population, and may have unknowingly brought the infection onboard the ship.
This kind of exposure — brief, incidental contact with a rodent-heavy environment during what appeared to be a routine excursion — illustrates how difficult hantavirus outbreaks are to anticipate or prevent. Passengers on expedition cruises frequently visit remote and wild environments as part of the travel experience, often without any awareness of the biological risks present.
The International Response
The World Health Organization confirmed that contact tracing operations and isolation protocols are currently taking place in several countries connected to passengers who left the M/V Hondius in April. Authorities are also investigating possible exposure involving a commercial flight tied to one infected traveler.
According to WHO Director-General Tedros Adhanom Ghebreyesus, at least 12 countries are currently receiving support from the World Health Organization to monitor people who came home after leaving the cruise ship in Saint Helena. The countries include Canada, Denmark, Germany, Netherlands, New Zealand, Saint Kitts and Nevis, Singapore, Sweden, Switzerland, Turkey, United Kingdom, and United States.
Five US states have reported that they are monitoring persons who were aboard the vessel, with individuals under observation in Georgia, Texas, Arizona, and Virginia. The New Jersey Department of Health is also monitoring two individuals who did not board the vessel but may have come into contact with a confirmed case on their plane.
What Officials Are Saying
With comparisons to COVID-19 circulating on social media, WHO officials moved quickly to address public concern directly. WHO expert Maria Van Kerkhove addressed the issue during a press conference, saying the situation is not the next COVID, but that it is a serious infectious disease and that people who are infected can die. She added that accurate information is critical, and that most people will never be exposed to this virus.
The reassurance was measured but clear — this is not a pandemic-level threat, but it is a real one for those in the exposure chain, and the response reflects that.
On Friday morning, a WHO official confirmed to CBS News that a KLM Royal Dutch Airlines flight attendant who had contact with cruise passengers and was hospitalized in the Netherlands for observation tested negative for hantavirus. That result was considered encouraging by health authorities, though monitoring of other potentially exposed individuals continues.
What Happens Next
The investigation into the origin and spread of the outbreak is ongoing. Contact tracing across 12 countries is a significant logistical undertaking, made more complicated by the fact that passengers had already returned home and scattered across the globe before the scale of the outbreak was understood.
Health officials are urging anyone who was aboard the M/V Hondius during the relevant period and is experiencing symptoms — which can include fever, fatigue, and respiratory difficulty — to contact their local health authority immediately and disclose their travel history.
For the general public, the risk remains very low. The Andes virus requires close, sustained contact with an infected person to spread from human to human, and the outbreak appears connected to a specific exposure event in a specific location. It is not circulating in communities.
But for the families of the three people who did not survive, and for the six others still fighting the virus, this outbreak is a reminder of how quickly a single moment in a remote landscape — a birdwatching trip, a landfill, a rodent population no one noticed — can set something irreversible in motion.
Authorities say they will continue to provide updates as the investigation develops.