The hantavirus outbreak linked to the Dutch cruise ship MV Hondius has expanded with the confirmation of a second Spanish passenger testing positive for the virus, the World Health Organization (WHO) and Spain’s health ministry announced this week. As the ship departs Tenerife for Rotterdam, authorities are monitoring the situation closely, with three deaths already reported among passengers and crew. The WHO’s Director-General, Dr. Tedros Adhanom Ghebreyesus, stressed that while there is “no sign” of a larger outbreak at this time, the risk remains due to the virus’s long incubation period—up to eight weeks—meaning further cases could still emerge.

This development comes as the MV Hondius completed its evacuation of all passengers and crew, with the final 28 passengers arriving in Eindhoven, Netherlands, on May 12. The ship itself is now en route to Rotterdam for thorough disinfection. Meanwhile, health officials in Spain and the Netherlands are implementing strict quarantine measures for exposed individuals, including 12 hospital workers in Nijmegen who were placed in isolation after handling potentially contaminated samples from an infected passenger.

The confirmed cases—nine total, with two suspected—are all linked to the cruise ship, according to the WHO. The virus in question is the Andes hantavirus, which is the only strain known to spread person-to-person, typically through close contact with an infected individual. The CDC notes that hantaviruses are primarily transmitted through exposure to rodent urine, droppings, or saliva, but the cruise ship outbreak suggests secondary transmission may have occurred among passengers.

Key Developments in the Hantavirus Cruise Ship Outbreak

As of May 26, 2026, the following details have been verified by the WHO and national health authorities:

• Confirmed cases: Nine (all linked to the MV Hondius), including a French national in intensive care with severe respiratory symptoms and a second Spanish passenger now testing positive (BBC).
• Suspected cases: Two unconfirmed, currently under investigation.
• Fatalities: Three passengers or crew members have died, though exact causes are pending final confirmation.
• Quarantine measures: Spain’s military hospital in Madrid is isolating 13 evacuated passengers (all tested negative) and 12 Dutch hospital workers in Nijmegen (WHO/BBC).
• Ship status: The MV Hondius departed Tenerife on May 10 and is now sailing to Rotterdam for disinfection, with no immediate plans for further voyages.

Understanding Hantavirus: Transmission, Symptoms, and Risks

The hantavirus family includes several strains, but the Andes virus—responsible for this outbreak—is particularly concerning due to its person-to-person transmission capability. According to the CDC, hantaviruses typically cause two syndromes:

• Hantavirus Pulmonary Syndrome (HPS): Found in the Americas, including the U.S., where the deer mouse is the primary carrier. Symptoms include fatigue, fever, muscle aches, and later, severe respiratory distress.
• Hemorrhagic Fever with Renal Syndrome (HFRS): More common in Europe and Asia, often linked to the Seoul virus carried by rats. Symptoms include fever, abdominal pain, and kidney failure.

The current outbreak aligns with HPS-like symptoms, given the respiratory complications reported in the French patient. The WHO emphasizes that the risk of further spread remains low but cautions that the virus’s incubation period—up to eight weeks—means cases could still emerge in the coming months.

Why the cruise ship outbreak is unusual: While hantaviruses are typically rodent-borne, the MV Hondius case suggests secondary transmission among humans. Health officials are investigating whether the virus was introduced via contaminated food, water, or rodent exposure during the voyage.

Global Response: WHO and National Health Authorities Act

The WHO’s response has been coordinated with national health agencies, including Spain’s Ministry of Health and the Netherlands’ Rijksinstituut voor Volksgezondheid en Milieu (RIVM). Key actions include:

• Evacuation and quarantine: All passengers and crew were evacuated, with infected individuals isolated in specialized facilities. Spain’s military hospital in Madrid is handling the most severe cases.
• Disinfection protocols: The MV Hondius is undergoing deep cleaning in Rotterdam, following strict protocols to prevent further contamination.
• Public health advisories: The CDC and WHO have issued guidance on hantavirus symptoms, urging travelers to seek medical attention if they develop fever, muscle aches, or respiratory issues within weeks of potential exposure.

Dr. Tedros Adhanom Ghebreyesus, WHO Director-General, stated at a press conference in Madrid: “‘At the moment, there is no sign that we are seeing the start of a larger outbreak. But the situation could change, and given the long incubation period of the virus, it’s possible we might see more cases in the coming weeks.’” His remarks reflect the cautious optimism shared by public health experts, who are monitoring the situation closely.

What Happens Next? Monitoring the Outbreak and Preventing Further Spread

With the MV Hondius now in Rotterdam, authorities are focusing on three critical areas:

1. Contact tracing: Identifying and monitoring all individuals who had close contact with confirmed cases, including crew members, medical staff, and passengers.
2. Laboratory testing: Expanding diagnostic efforts to detect any additional cases, especially among asymptomatic individuals who may still be contagious.
3. Public communication: Providing clear, science-based guidance to prevent panic while ensuring accurate information reaches travelers and healthcare providers.

The next official update from the WHO is expected by June 2, 2026, when a full epidemiological assessment will be released. In the meantime, the CDC recommends travelers who suspect hantavirus exposure to:

• Seek medical attention immediately if symptoms develop.
• Avoid close contact with rodents or their waste.
• Follow local health advisories for quarantine or testing.

For the latest official updates, visit:

• World Health Organization (WHO)
• U.S. Centers for Disease Control and Prevention (CDC)
• Rijksinstituut voor Volksgezondheid en Milieu (RIVM)

Key Takeaways: What You Need to Know

• The hantavirus outbreak linked to the MV Hondius has now confirmed nine cases, with a second Spanish passenger testing positive.
• Three deaths have been reported, but authorities stress that the risk of a larger outbreak remains low.
• The Andes hantavirus strain is the only one known to spread person-to-person, primarily through close contact.
• Symptoms include fever, muscle aches, and severe respiratory distress, with an incubation period of up to eight weeks.
• All passengers and crew have been evacuated, and the ship is undergoing disinfection in Rotterdam.
• The next WHO update is expected on June 2, 2026.

As this story develops, we will continue to provide verified updates. In the meantime, we encourage readers to share this article and leave comments below with any questions or concerns about hantavirus prevention and symptoms.