May 2
WHO notified
WHO was notified of a cluster linked to the MV Hondius cruise ship.
Cruise ship cluster · Global public-information page
MV Hondius Hantavirus Outbreak: Timeline, Countries, and Current Risk
This page explains the MV Hondius hantavirus cluster in calm, source-based terms. It focuses on the timeline, case counts, countries involved, Andes virus context, and current public-risk calibration.
Latest situation
As of May 8, 2026, ECDC reports 8 cases linked to MV Hondius: 5 confirmed, 2 probable, 1 suspected, and 3 deaths. ECDC assesses the risk to the EU/EEA general population as very low.
WHO also reported 8 cases and 3 deaths in its May 7 update and assessed the broader public-health risk as low.
MV Hondius outbreak timeline
A quick timeline of key public-health updates related to the MV Hondius hantavirus cluster.
May 4
Initial WHO outbreak update
WHO published a Disease Outbreak News update.
May 7
WHO media update
WHO reported 8 cases, 3 deaths, and a low broader public-health risk assessment.
May 8
ECDC case summary
ECDC reported 8 linked cases: 5 confirmed, 2 probable, 1 suspected, and 3 deaths, with very low risk for the EU/EEA general population.
Countries involved does not mean local outbreaks
When health agencies mention multiple countries, it may refer to passenger nationality, crew nationality, contact tracing, medical evacuation, repatriation, treatment location, or public-health monitoring. It does not automatically mean local community transmission in those countries.
May mean
- Passenger or crew nationality
- Contact tracing
- Medical evacuation
- Repatriation
- Treatment location
- Public-health monitoring
Does not automatically mean
- Local community transmission
- A country-wide outbreak
- High risk from casual public contact
- Confirmed spread in every listed country
Current risk calibration
General public
WHO and ECDC describe broader public risk as low or very low. People with no relevant exposure do not need to panic.
Passengers and crew
Passengers and crew may be monitored because they may have shared a travel-related exposure context.
Close contacts
Close contacts may be followed more carefully because Andes virus can rarely spread after close or prolonged contact.
People with no relevant exposure
If you were not on the ship, not in close contact with a suspected or confirmed case, and had no rodent-contaminated exposure, there is usually no special reason to panic.
Why Andes virus is being discussed
Andes virus is a hantavirus associated with South America. It is discussed separately because rare person-to-person spread has been documented, usually in close or prolonged contact contexts rather than casual everyday contact.
Read the Andes virus page
Use the Andes virus explainer for more context on why this virus is treated differently from most hantaviruses.
Symptoms to watch for after relevant exposure
Symptoms after relevant exposure may include fever, muscle aches, fatigue, headache, dizziness, chills, and abdominal symptoms such as nausea, vomiting, diarrhea, or abdominal pain. In more severe cases, breathing difficulty can develop. These symptoms do not by themselves confirm hantavirus infection, but readers should seek medical advice if symptoms appear after relevant exposure.
What is not yet known
- The exact exposure source may still be under investigation.
- Case counts may change as public-health reporting is updated.
- Public health guidance may vary by country depending on jurisdiction, travel history, and exposure definitions.
WHO context
WHO reported 8 cases and 3 deaths in its May update, with 5 of 8 confirmed as hantavirus. WHO assessed the public-health risk as low while noting that passenger, crew, and close-contact follow-up remains important.
What to read next
Is hantavirus contagious?
See why Andes virus is treated differently from most hantaviruses.
Should you worry about hantavirus?
Read the hantavirus risk guide for a calm explanation of who actually needs to worry more about exposure.
Hantavirus antidote / cure
Review what CDC and WHO actually say about treatment and supportive care.
Hantavirus symptoms
See early signs, later symptoms, and when urgent evaluation matters.
How hantavirus spreads
Review the usual rodent-borne routes and the Andes virus exception.
Hantavirus prevention
Use practical prevention guidance for homes, travel, and rodent-exposure settings.
Sources
-
ECDC Andes hantavirus outbreak update
Provides the latest European case summary, including confirmed, probable, and suspected cases and the very low EU/EEA public-risk framing.
-
WHO response update, May 7, 2026
Summarizes WHO’s May media update with 8 cases, 3 deaths, and a low public-health risk assessment.
-
WHO Disease Outbreak News, May 4, 2026
Provides the initial outbreak chronology and explains when WHO was first notified of the cluster.
-
CDC Current Situation
Adds CDC’s public-risk framing and plain-language context for U.S. readers and travelers.
Last updated: May 9, 2026
This page is for general information only and is not medical advice. If you may have been exposed or have symptoms, contact a qualified healthcare professional or local public health authority.