Eurosurveillance publishes full investigation of cruise ship hantavirus
Science and data reviewer
Timestamp shown in UTC unless otherwise indicated.
Science documents
On June 18, 2026, Eurosurveillance published an article. It is the official scientific description of the MV Hondius hantavirus outbreak.
The authors are an international group of scientists and epidemiologists. They collected data from 33 countries. The result — a detailed picture of how the virus spread.
Key numbers
13 cases. 12 confirmed. 1 probable. Three deaths. Fatality rate — 23%. That is below average for Andes virus — but still very serious.
10 of 13 patients were hospitalized. 8 recovered and were discharged. 2 are still in treatment.
| Category | Confirmed | Probable | Total |
|---|---|---|---|
| Passengers | 9 | 1 | 10 |
| Crew | 3 | 0 | 3 |
| Total | 12 | 1 | 13 |
How the virus spread
First cases — on land, before boarding. The index patient likely got infected on a birdwatching trip in Ushuaia. Then — on-board transmission.
Andes virus is the only hantavirus with confirmed human-to-human transmission. But only through close contact. The ship had such conditions.
Global coordination
The article describes the international response mechanism. WHO, ECDC, CDC, PAHO, national health authorities — all worked together.
Europe activated the EWRS system on the day of notification. The EU Health Task Force sent an expert on board. Contacts were traced in 33 countries.
'This event required medical evacuation, repatriation, international contact tracing, isolation, and testing. Unprecedented coordination.' — Eurosurveillance, June 2026
What is next
The investigation continues. Scientists are sequencing complete viral genomes. They compare samples from Chile and Argentina. They are searching for the exact source of infection.
One thing is clear already: the world was not ready for a rare virus outbreak on a cruise ship. The system worked, but at its limit.