Answer first: The MV Hondius Andes hantavirus outbreak stands at 9 confirmed cases, 2 probable, and 3 deaths as of May 13, 2026. All on a single 196-passenger expedition ship (174 on polar voyages) that departed Ushuaia on April 1. WHO rates global risk low. The reservoir host (a small South American rodent) does not exist on Caribbean, Mediterranean, Alaskan, Bahamian, Asian, or transatlantic cruise routes. If you are booked on a mainstream cruise, nothing changes for you. If you are booked on an expedition cruise out of southern South America, the change is screening and protocols, not cancellation.
Three people are dead. A 70-year-old Dutch man who fell ill on April 6 and died on April 11, before the ship had any idea what it was dealing with. Two others since. Their families are grieving people who went on the trip of a lifetime. Whatever else this article says, that is the first true thing about this outbreak, and it deserves to sit at the top.
The second true thing is harder to hold in the same hand: this is not the start of another pandemic. Hantaviruses have been characterized since 1976. The Andes strain has been known since 1995. Its one unusual feature, rare person-to-person spread in close quarters, has been documented since a 1996 outbreak in Bariloche, Argentina, and re-documented in clusters since. None of that is news. What is news is that this is the first time it has happened on a cruise ship.
That distinction matters because the question most people are asking, "is it safe to cruise right now?", has a different answer depending on which cruise. Below is what is known, what is not, and what to actually do, sorted by the itinerary you have on the calendar.
What Happened, in Order
The MV Hondius is a 196-passenger expedition ship (174 on polar voyages) operated by Oceanwide Expeditions, a Dutch company that runs polar itineraries: Antarctic Peninsula in austral summer, sub-Antarctic islands, and a long late-season repositioning across the South Atlantic toward Africa. The April 2026 sailing was that repositioning trip, the one most large-ship cruisers have never heard of, with a guest list of birders, polar enthusiasts, and people for whom Tristan da Cunha is a bucket-list call rather than a typo.
The published timeline, drawn from the WHO Disease Outbreak News bulletin and the ECDC outbreak update:
| Date | Event |
|---|---|
| Pre-April 1 | A Dutch couple completes a three-month birding trip across Argentina, Chile, and Uruguay. Including sites within the Andes virus endemic range. |
| April 1 | MV Hondius departs Ushuaia, Argentina, for a sub-Antarctic and South Atlantic crossing. |
| April 6 | The 70-year-old Dutch man (now identified as the index case) develops fever, myalgia, and chills onboard. |
| April 11 | Index case dies onboard. Cause not yet known at the time. |
| Mid-April | Ship calls at St. Helena; more than 30 passengers disembark. Subsequently calls at Tristan da Cunha. |
| May 2 | WHO notified by the Netherlands of a cluster of severe acute respiratory illness on the ship. |
| May 3 | Ship arrives at Praia, Cape Verde. Cape Verde declines full disembarkation; the ship remains in port under medical supervision. |
| May 6 | MV Hondius departs Cape Verde for Tenerife (Canary Islands) with additional medical resources aboard. |
| May 10 | MV Hondius arrives at Port of Granadilla, Tenerife. Disembarkation under medical supervision begins. |
| May 11 | Evacuation flights repatriate passengers to six European countries and Canada. One American is transferred to the biocontainment unit in Nebraska. |
| May 13 | ECDC updates totals: 9 confirmed, 2 probable, 3 deaths. CDC classifies its response at Level 3 (multi-state response, no travel restriction). |
Two things to read out of that timeline. First, the gap between the index case's onset on April 6 and the WHO notification on May 2 is the period in which onboard transmission appears to have happened. Close-contact spread in shared cabins and the small interior spaces of an expedition ship, before anyone knew what to isolate. Second, the ship is now empty, deep-cleaned, and not sailing again until investigators clear it.
What Andes Virus Actually Is
Hantaviruses are a family of RNA viruses carried by rodents. The species that carries Andes virus is the long-tailed pygmy rice rat (Oligoryzomys longicaudatus), native to the southern Andes and Patagonian steppe of Argentina and Chile. Roughly the latitude band from northern Patagonia down to about Coyhaique. Tierra del Fuego provincial health authorities note that Ushuaia, the port the Hondius sailed from, sits about 1,500 km south of the documented endemic range and has never recorded a local case.
Humans catch hantavirus almost always one way: by breathing in air that contains dried, aerosolized urine, droppings, or saliva from an infected rodent, typically inside an enclosed space, a cabin, woodshed, shelter, storage barn, where someone has just disturbed nesting material. Less commonly through a bite, or skin contact through broken skin, or eating contaminated food. The CDC's hantavirus prevention guidance, in place since the 1993 Four Corners outbreak that introduced North Americans to the virus, is essentially the same as it was thirty years ago: ventilate first, don't sweep, wet-clean.
Andes virus has one feature that sets it apart from every other hantavirus on the planet: rare, close-contact human-to-human transmission. It was first documented in the 1996 Bariloche outbreak in southern Argentina, where a cluster of cases among unrelated healthcare workers and household members of an index patient could not be explained by rodent exposure alone. It has shown up again, in family clusters, in a healthcare worker cluster, every few years since, most recently in the 2018–2019 Epuyen outbreak that produced 34 cases and 11 deaths over several months in another Patagonian community. The Hondius outbreak is the first time this mechanism has been observed on a ship.
"Close contact" in the Andes virus literature means living in the same household, sharing a bed, providing direct care during illness, or, extrapolating to the ship, sharing a small cabin and bathroom while one occupant is symptomatic. It does not appear to mean passing someone in a corridor. It is not airborne the way measles is airborne. After three decades of documented person-to-person clusters, the largest single cluster on record is in the low dozens.
Why This Is Not a Pandemic
The word "pandemic" has a specific shape. It requires sustained human-to-human spread, a reproductive number meaningfully above 1, and a population without effective barriers. None of those describe Andes virus.
Look at the numbers. The Hondius sailed on April 1. Onboard transmission appears to have had roughly the full month of April and the first week of May to play out: about five weeks of unmitigated close contact across approximately 175 souls (114 passengers and 61 crew) on a small ship where sharing cabins, dining rooms, and zodiac landing prep areas was unavoidable. The total result so far: 9 confirmed cases. A respiratory virus with a reproductive number above 1 would have produced dozens or hundreds in the same window. COVID on the Diamond Princess in 2020, same ship size class, comparable timeframe, similar close-quarters opportunity, produced 712 cases. Norovirus on a typical cruise outbreak hits 4 to 8 percent of the manifest in a week. Andes virus on the Hondius, with five weeks of opportunity, hit roughly 5 percent of the manifest in total, and the spread appears to have stopped once infected passengers were identified and isolated.
Hantavirus does not pandemic. It hurts the people it reaches badly, case fatality ratios in the 25 to 40 percent range, no specific antiviral, supportive care only, but it does not chain reliably from person to person. The Hondius cluster is the worst-case version of what Andes virus is capable of in a confined setting. It is still small.
WHO's own risk assessment, published May 8, says exactly this. Ship-level: moderate, for people on that specific ship and their close contacts. Global: low. ECDC's assessment for the EU/EEA general population is "very low." CDC's Level 3 classification is a multi-state coordinated response, not a travel restriction. None of the agencies tracking this outbreak are advising people to cancel cruises.
How This Compares to Other Shipboard Outbreaks
Cruise audiences have a frame of reference for shipboard outbreaks that is built almost entirely from norovirus and COVID. Andes virus is a different organism with different math. The table below is rough but directionally honest.
| Pathogen | Primary spread | Typical R onboard | Typical CFR | Standard prevention |
|---|---|---|---|---|
| Norovirus | Fecal–oral, fomite, aerosol from vomit | 2 to 8 | ~0.1% | Soap-and-water hand wash, surface bleach, isolate symptomatic, USPH inspections |
| SARS-CoV-2 (COVID) | Respiratory droplets, aerosol | 2 to 5 (variant-dependent) | 0.5–3% (age-skewed) | Vaccination, ventilation, masks during waves, isolation |
| Influenza | Respiratory droplets | 1 to 2 | ~0.1% | Annual vaccine, antivirals, isolation |
| Legionella | Water systems (showers, spas) | No person-to-person spread | ~10% | Water-system maintenance, hot-tub chemistry, chlorine |
| Andes hantavirus | Rodent excreta inhalation; rare close-contact human-to-human | Well below 1 in most settings | 25–40% | Avoid rodent-occupied structures, ventilate before cleaning, isolate symptomatic close contacts for 42 days |
The thing the table doesn't show, but matters: norovirus and COVID are problems for nearly every cruise ship in the world, every year. Andes virus is, as far as the record shows, a problem for exactly one cruise ship, once.
What to Do, by Itinerary Type
If you are booked on a mainstream cruise (Caribbean, Mediterranean, Alaska, Bahamas, Asia, Northern Europe, transatlantic, world cruise on a large ship)
Nothing changes. The rodent reservoir does not exist on these routes. The person-to-person mechanism that made the Hondius cluster possible required the index case to have arrived already infected from a Patagonian birding trip, with onset onboard, on a small expedition ship with shared cabins. A 4,000-passenger Caribbean sailing has none of those preconditions. Continue with the same standard hygiene that prevents the actual shipboard risks you should be thinking about, norovirus and respiratory virus. Wash your hands at the buffet entry. Don't board sick. If you have a sniffle on day three, use the medical center; that's what it's for. The tech and packing piece and the tipping piece are the actual planning work in front of you, not this.
If you are booked on an expedition cruise out of Ushuaia, Punta Arenas, or anywhere in southern South America in the next 6 to 12 months
Your trip is not cancelled and most likely won't be. What will change, and to some extent already has:
- Pre-boarding screening. Operators are adding pre-embarkation health questionnaires asking specifically about overland travel in the prior 8 weeks, lodging in remote shelters, and rodent exposure. Answer them carefully. The questions are designed to catch what the Hondius missed.
- Onboard isolation protocols. Expedition ships are upgrading the ability to isolate a symptomatic guest: single cabin, separate ventilation where feasible, dedicated crew. Some operators have added respiratory-illness PPE to crew kit by default.
- Port-side briefings. Pre-trip and on-arrival briefings now include rodent-exposure avoidance: don't enter abandoned shelters or outbuildings, don't disturb stored gear, report rodent sightings on landing camps, wet-clean don't sweep, ventilate spaces before entering. This is standard CDC hantavirus guidance that hikers and field biologists in endemic regions already follow.
- Trip insurance. If you don't have it, get it. The infectious-disease and trip-interruption riders matter more on this kind of itinerary than on a mainstream cruise.
If your operator has not communicated any change in protocols by the time you're 60 days out, ask. The good ones will tell you what they're doing.
If you were on the MV Hondius, on an overland trip through Patagonia recently, or on any expedition sailing that departed Ushuaia in March or April
Self-monitor for 42 days from your last potential exposure date. The WHO incubation window for Andes virus is 1 to 6 weeks, occasionally as late as 8 weeks, which is where the 42-day figure comes from. Symptoms to act on:
- Fever ≥ 38°C (100.4°F)
- Severe muscle aches, especially in thighs, back, and shoulders
- Chills
- Followed by, or accompanied by, shortness of breath, dry cough, or gastrointestinal symptoms (nausea, vomiting, abdominal pain)
If any of those appear, contact your healthcare provider immediately and say two specific things: the dates of your cruise or overland trip, and that you may have been exposed to Andes hantavirus. The reason for the precision is that hantavirus pulmonary syndrome is fast. The prodrome looks like flu for two to five days, then can progress to severe pulmonary edema within hours. Early ICU-level supportive care meaningfully changes outcomes; the case fatality figure for people who reach the hospital before respiratory collapse is significantly lower than the headline 38 percent.
A garden-variety cold during the monitoring window is almost certainly a garden-variety cold. The signal that warrants the phone call is the combination, fever and myalgia, then respiratory symptoms. If you're a close-contact case (shared cabin, provided care, household member of a confirmed case), public health may already be in touch with a more formal monitoring plan that includes possible quarantine. Cooperate; the 42-day window is finite.
How Cruise Lines Are Adjusting
Mainstream lines, the Carnivals, Royal Caribbeans, Princesses, Norwegians of the world, are not changing protocols, because their existing protocols already address what is relevant. The Vessel Sanitation Program inspections that target norovirus catch the same hand-hygiene and surface-cleaning failures that would matter for any enteric or respiratory pathogen. The gastrointestinal-illness log every USPH-jurisdiction ship maintains is the same log that would flag a hantavirus cluster early.
Expedition operators are the ones moving. Oceanwide Expeditions has paused MV Hondius sailings pending the joint WHO/ECDC/Dutch public health investigation. Other expedition operators, Quark, Aurora, Hurtigruten, Lindblad/National Geographic, Ponant, Silversea Expeditions, have all issued statements emphasizing pre-boarding screening, onboard medical capability, and isolation protocols. None has cancelled an itinerary that did not already need to be cancelled for seasonal reasons. The Antarctic season is closing for the southern winter, so the next big test is the 2026–2027 austral summer; expect tighter screening on those bookings.
What this means in practice: if you're booked on a polar expedition for 2026–2027, you will probably fill out one more health form, sit through one more briefing, and notice one more sanitation routine than you would have a year ago. That's the right response. None of it should make your trip materially harder.
The Other 2026 Cruise Health Story: Norovirus on the Caribbean Princess
If you've been reading about the Hondius, you've probably also seen the parallel headlines about Princess Cruises' Caribbean Princess. The two stories travel together in feed algorithms because they share the word "outbreak," but they sit in completely different categories of cruise-health math. Worth understanding the gap.
The facts. Caribbean Princess departed Fort Lauderdale on April 28, 2026, on a Caribbean itinerary. By the time the ship reached Port Canaveral for changeover on May 11, the onboard gastrointestinal-illness log had recorded approximately 102 passengers and 13 crew with diarrhea and vomiting consistent with norovirus. Princess executed standard deep-cleaning protocols at Port Canaveral; the CDC's Vessel Sanitation Program followed up with an inspection. It is the second Caribbean Princess norovirus incident of 2026.
The math, contextualized. Norovirus on cruises is annual and well-understood. The VSP-reportable threshold is ≥3% of passengers or crew presenting with acute gastroenteritis; outbreaks meeting that threshold average roughly 10 to 15 per year across the US-jurisdiction cruise fleet, and have for decades. Case fatality is around 0.1%, almost entirely in elderly or immunocompromised patients who become dehydrated. Cruise ships do not amplify norovirus disproportionately compared to other closed-population settings: daycares, nursing homes, schools, and college dorms produce comparable or larger outbreaks every year. The reason cruises make the news is geometric: the cases concentrate in one vessel, one week, one passenger manifest, and the ship has a name.
What actually works. Soap and water beats hand sanitizer for norovirus. Alcohol-based sanitizers do not reliably inactivate the virus, which is why the gel at the buffet entrance is not a substitute for the sink. Wash before eating, after using the bathroom, when leaving the buffet, and after handling shared serving utensils. If you feel sick, report to the medical center and stay in your cabin; isolating a symptomatic person within the first 12 hours of symptoms is the single most effective break in the chain. The cruise line's response is mature: GI log, isolation cabin, deep-clean cycle, sometimes a buffet conversion to crew-served. Let it work.
The bottom line. The Caribbean Princess story is the kind of cruise-health story that has happened roughly ten times a year, every year, for decades. It is bounded, predictable, and addressable. It is not in the same category as Hondius: different pathogen, different transmission mechanism, different ship size class, different geography, different math entirely. The appropriate response to a norovirus headline is the same response cruisers have always had: wash your hands, don't board sick, isolate early. The appropriate response to a hantavirus headline is to know which itinerary you're on. Both are knowable. Neither requires cancelling your trip.
Three Reads
The Caribbean cruiser
You're sailing Royal Caribbean, Carnival, or Norwegian out of a Florida port this summer. The Andes virus story is the same news as a story about a flood in a country you'll never visit: real, sad, not yours. Your actual cruise health concerns are norovirus on board (rare, but real, and prevented by handwashing rather than hand-sanitizer), respiratory bugs in the buffet line, and sunburn on Day One. The Hondius outbreak should not change a single thing about your trip.
The bucket-list polar cruiser
You've been saving for an Antarctic Peninsula trip in November 2026 and the news has shaken you. Read the operator's communication. Notice that none of them have stopped selling cabins. Notice that the people who actually study this virus, WHO, ECDC, CDC, have not advised against the trip. The version of caution that is appropriate here is to confirm trip insurance with infectious-disease coverage, to be honest on the health questionnaire about anywhere you visited in the prior eight weeks, and to follow the in-port briefings. The version of caution that is not appropriate is canceling a once-in-a-lifetime trip because of a virus your itinerary almost certainly cannot deliver.
The recently-returned passenger
You came home in March or April from a Patagonia trip. Whether on the Hondius or independently. You are inside the 42-day window. You're checking your forehead at the kitchen sink and feeling guilty about every twinge in your back. Some of that vigilance is the right vigilance. Some of it is the body doing what bodies do when the mind has been reading the news. The line to walk: pay attention to fever plus severe muscle aches plus any respiratory or GI symptom, and call your doctor if you see that combination. Don't pay attention to ordinary tiredness or ordinary aches. If you're sleeping poorly because you're scared, mention it to your doctor too; that is also a thing they help with.
FAQ
Is it safe to go on a cruise right now after the hantavirus outbreak?
For mainstream cruise itineraries, Caribbean, Mediterranean, Alaska, Bahamas, Northern Europe, Asia, transatlantic, yes. The rodent species that carries Andes virus lives only in southern Argentina and Chile, far from any port your large-ship sailing will visit. WHO assesses global risk as low. The outbreak is bounded to one 196-passenger expedition ship (174 on polar voyages) and its contacts.
Can hantavirus spread on a cruise ship like norovirus or COVID?
No. Andes virus is the only hantavirus that has ever been documented spreading person-to-person, and even then it requires close, sustained contact. Typically within a household or a shared cabin. Its reproductive number is far below norovirus or COVID. After 40-plus days of opportunity on the MV Hondius, the total confirmed case count is 9, not hundreds.
Is hantavirus a new virus or a new pandemic threat?
No. Hantaviruses have been characterized since 1976. Andes virus specifically was identified in 1995, and person-to-person spread was first documented in a 1996 outbreak in Bariloche, Argentina. It is a known organism behaving in a known way. WHO does not classify it as a pandemic threat.
I was on the MV Hondius or a similar expedition cruise, what should I do?
Self-monitor for 42 days from your last potential exposure. Watch for fever ≥38°C, severe muscle aches, chills, plus shortness of breath or gastrointestinal symptoms. If any of those appear, contact your healthcare provider immediately and tell them you were aboard the MV Hondius or in the Andes virus endemic region. Routine quarantine is not required for most passengers; high-risk close contacts of confirmed cases may be asked to quarantine.
Should I cancel a booked Antarctic or Patagonian expedition cruise for 2026 or 2027?
Not based on what is currently known. WHO has not advised against travel. Expedition operators have already tightened pre-boarding health screening, port-side rodent-exposure briefings, and onboard isolation protocols. If your booking allows free changes, you have time to watch the situation; if it does not, your trip insurance covers documented medical reasons but typically not personal worry.
How is hantavirus actually caught?
Primarily by inhaling air contaminated with dried excreta from infected rodents, usually inside enclosed spaces, sheds, cabins, storage rooms, where droppings or urine have been disturbed. Less commonly by direct contact or bite. Andes virus adds the rare possibility of close-contact person-to-person spread. It is not airborne in the way COVID or flu are, and it does not spread through food, water, mosquitoes, or surfaces in public areas.
What about the Caribbean Princess norovirus outbreak, is that the same thing?
No. Different virus, different transmission, different math. The Caribbean Princess outbreak involved approximately 102 passengers and 13 crew with norovirus symptoms; the ship deep-cleaned at Port Canaveral on May 11, 2026 under CDC Vessel Sanitation Program supervision. Norovirus outbreaks on cruises average roughly 10 to 15 per year across the US-jurisdiction fleet and have for decades: bounded, addressable, and not in the same category as the MV Hondius hantavirus cluster. Standard prevention is soap-and-water handwashing (not hand sanitizer, which does not reliably kill norovirus) and reporting symptoms early so isolation breaks the chain.
Will there be cruise port screening like there was for COVID?
No, and it would not work even if there were. Hantavirus has a 1- to 6-week incubation. A passenger could pass a thermometer check at the pier and develop symptoms two weeks later at sea. The useful screening is a health questionnaire that asks about overland travel and rodent exposure in the prior 8 weeks. Several expedition operators have already added it.
Where to Go from Here
If you're early in planning your first cruise, the First Cruise guide walks the sequence: choosing a line, choosing a ship, packing, boarding, the small logistics. If your concern is broader cruise health and prep, the Cabin Organization piece covers how to set a cabin up for two weeks of healthy living, and the Packing Lists include the small hygiene items most first-timers forget. If you're a solo traveler weighing whether the news should change your booking, the Solo section and the Accessible Cruising piece have practical decision frames that hold up.
And if you're sailing soon and reading this at 2 a.m. with the headlines blurring together: the math is bounded. The rodent is not on your ship. The fear is real and the trip is fine.
Last Reviewed
Last reviewed: . This is an active outbreak; numbers above are accurate as of the review date and will move. Primary sources: WHO Disease Outbreak News (DON600), ECDC outbreak surveillance update, CDC HAN Notice 528. Historical hantavirus background draws on CDC Hantavirus pages and the published literature on the 1996 Bariloche and 2018–2019 Epuyen outbreaks. For the freshest case totals, the WHO and ECDC pages are updated faster than this article will be.