The MV Hondius docked, the passengers scattered home to a dozen countries, and now everybody’s trying to pin down where the Andes virus got on board. Welcome to the source hunt. This is Hantavirus Watch. And if you were anywhere near Patagonia in the last six weeks, stay with us — because the itinerary question is still open. We’ve got confirmed Andes hantavirus cases tied to this outbreak, a Patagonian community pushing back hard on being named as the source, and a pretty big gap between what health agencies have confirmed and what’s getting repeated like fact. And we’re cutting through the COVID comparison noise, too — because Andes virus does not spread the same way, and that changes what you actually do right now. Here's RNZ News:
Three people have died and at least six others appear to be infected after an outbreak of hantavirus on the cruise ship MV Hondius, which was travelling around South America last month.
Passengers on the cruise ship have been evacuated in the Canary Islands. One New Zealander has been confirmed to be among them.
Let’s be precise about what we’re talking about: the MV Hondius, a Dutch-flagged vessel, three confirmed deaths, at least six apparent infections. And the strain matters, because hantaviruses do not all behave the same way. We still do not have an official WHO strain designation for this outbreak, so Andes virus is the prime suspect based on the South American itinerary. The ship docked in Tenerife on May 10, and passengers were off-loaded at an industrial port in the Canary Islands. So if you were on the Hondius, or you crossed paths with those passengers in port, that’s the geography that matters. Both WHO’s Director-General and epidemiologist Michael Baker have said it plainly: this is not another COVID. The reason is transmission biology — classic hantavirus, including Andes, does not have the sustained human-to-human airborne spread that made SARS-CoV-2 a pandemic pathogen. WHO’s current public-health risk assessment is low. Low global risk is not the same question as, ‘What do I do if I was on that ship and now I have a fever and muscle aches?’ Those are two different things, and I want the second one answered. From BBC News:
But in recent days it has been grappling with a different kind of fame, one that has cast a shadow over local businesses and officials: the suggestion it could be 'ground zero' for the hantavirus outbreak on the Dutch vessel MV Hondius.
Picking up the source question from last edition: Ushuaia is now officially pushing back on the idea that it seeded the Hondius cluster. The strain still hasn’t been publicly named in confirmed reporting, so we’re waiting on whether this is Andes — which would mean person-to-person transmission is possible — or something else entirely. The ship left Ushuaia on April 1, with 114 passengers, 61 crew, and 22 countries of origin. And one of the leading theories is a landfill site on the edge of town where tourists go birdwatching. If you were on that ship and you did that excursion, that’s the question you’re asking your doctor right now. Ushuaia denying it was ground zero is not the same thing as epidemiological evidence clearing it. Until Argentina’s health ministry or PAHO names a confirmed exposure site with case data attached, ‘we didn’t cause this’ is a tourism statement, not a clinical one. And the ship is sitting in Tenerife while passengers are being evacuated and flown to 22 different countries. That contact-tracing geography is a mess, and I still haven’t seen the cruise line publish the excursion manifest. From The Independent:
The World Health Organization(WHO) said that detailed investigations are currently underway into the incident, including extensive laboratory testing and epidemiological studies to understand the virus's spread. Sequencing of the virus from the current outbreak is also ongoing.
The key word in every official statement right now is ‘suspected.’ WHO has confirmed the investigations are underway, sequencing is ongoing, and we still do not have a named strain. That matters a lot: Andes, Seoul, and Sin Nombre behave very differently, and one of those — Andes — has documented limited human-to-human transmission. The others do not. Twenty British passengers are now in an isolation facility, three people are dead, and the word ‘suspected’ is doing a lot of heavy lifting. What port did this ship call at? What were passengers doing on shore? Because if someone picked this up from rodent exposure at a wildlife excursion versus catching it from a sick cabinmate, those are totally different threat profiles for everybody else on that itinerary. Exactly why strain ID has to come first. If sequencing confirms a New World hantavirus — especially Andes — then the human-to-human question is live. If it’s an Old World strain like Seoul, close-contact transmission off a cruise ship is not the mechanism we’re worried about; rodent exposure somewhere along that route is. WHO’s epidemiological study should answer the exposure geography. Until it does, I’m not moving the risk dial. Deutsche Welle, with Zulfikar Abbany:
But there is a significant difference between COVID and hantavirus.
"Hantaviruses — including the Andes virus — are fundamentally different from coronaviruses," Roman Wölfel, head of the Bundeswehr Institute of Microbiology, told DW. "They can be transmitted from person to person, but far less easily and only through very close contact."
To be precise, this is Andes virus, not Sin Nombre, not Seoul — and that distinction matters because Andes is the one with documented person-to-person transmission, which is exactly why the MV Hondius situation drew WHO-level attention. Three dead, 147 people — passengers and crew — now being repatriated to Germany, France, and Australia. If you were on that ship, or you met someone who was, that’s the geography your doctor needs to hear. Tedros wrote directly to Tenerife residents because the Hondius was docking at Granadilla Port, and his message was basically: this is not COVID, and person-to-person spread requires very close contact. The Bundeswehr Institute’s Roman Wölfel said the same thing explicitly. That’s a meaningful guardrail against the pandemic-shaped panic. It also took more than three weeks after the first death to confirm hantavirus on that ship. So if you’re a returned passenger feeling brushed off by a GP who hasn’t heard of this yet, push harder and say, ‘MV Hondius, Andes virus, April-May 2026.’ This one's from NDTV:
While the Hondius outbreak has left three people dead, it has yet to surpass the Epuyen outbreak, which recorded 34 cases and 11 fatalities between December 2018 and March 2019 in the town of 2,400 residents, situated in a part of the Andes where hantavirus is endemic.
Andes hantavirus — that’s the strain here, not Sin Nombre, not Seoul. And the Epuyen 2018-2019 outbreak is the benchmark: 34 confirmed cases, 11 deaths, human-to-human transmission confirmed, and a 45-day quarantine for contacts. The Hondius cluster, at three deaths, has not reached that scale — yet. Three dead on a cruise ship, and now we’re hearing from a woman who lost her father and two sisters in the last big Patagonian outbreak — in the same endemic zone. If you were on the Hondius or you’re planning a southern Andes trip, ‘it hasn’t surpassed Epuyen’ is cold comfort. What’s the actual contact-tracing radius right now? Fair question — and the Epuyen precedent is exactly why it matters. That outbreak confirmed person-to-person spread of Andes virus, which is the exception among hantaviruses globally. So the contact geography isn’t just ‘did you touch a rodent’ — it’s who shared close space with a symptomatic case aboard that ship. Have a question, a local update, or a correction for us? Send it to hantaviruswatch at lantern podcasts dot com. We read your notes, and they help us keep Hantavirus Watch accurate and useful.
We’ve put links to every story from today’s briefing in the show notes, so you can take a closer look at anything you want to follow up on.
That’s Hantavirus Watch for today. Thanks for listening. This is a Lantern Podcast.