Hantavirus Outbreak on Cruise Ship Raises Global Health and Containment Concerns

A recent outbreak of hantavirus, a rare rodent-borne virus, has infected passengers aboard a cruise ship, claiming the lives of 3 people as global health entities work to trace the source and contain the outbreak.¹

Hantaviruses are primarily spread through contact with rodent urine, feces, or saliva and can cause severe illness or death when contracted by humans. Although infections remain relatively uncommon, countries with warmer climates, including Argentina—where experts believe the current outbreak originated—have experienced recent spikes in cases. Passengers aboard the ship are reportedly practicing social distancing and isolating in their cabins as health officials continue monitoring the situation and conducting environmental assessments across shared ship spaces, while ill passengers are beginning to be evacuated for treatment.²

Despite growing global concern, Maria Van Kerkhove, director of epidemic and pandemic preparedness at the World Health Organization (WHO), sought to reassure the public in a statement to the Associated Press.²

“This is not the next COVID, but it is a serious infectious disease,” she said. “Most people will never be exposed to this.”

According to WHO data, hantavirus infections remain rare worldwide. In 2025, 299 documented cases and 59 deaths were reported across 8 countries in the Americas. However, in Argentina, where officials attribute the increase in infections partly to climate-related environmental changes, cases have risen sharply. Since June 2025, infection-related deaths have reportedly increased from 28 to 101 overall. Experts believe shifting weather patterns, land use changes, and increased human encroachment into rodent habitats may all be contributing to higher exposure risk.²

Disease progression can occur rapidly after infection. Early symptoms often resemble influenza and include fever, fatigue, headaches, muscle aches, chills, nausea, and dizziness.² In severe cases, symptoms can escalate quickly into respiratory distress or organ failure, making early recognition and medical intervention critical.

The hantavirus family encompasses several virus strains found in different regions of the world. In the Western Hemisphere, the most common strain can lead to hantavirus pulmonary syndrome (HPS), a severe respiratory disease that typically develops 1 to 8 weeks after exposure to infected rodents. Patients with HPS may experience coughing, shortness of breath, and chest tightness as fluid accumulates in the lungs. According to the CDC, approximately 38% of patients who develop respiratory symptoms from HPS may die from the disease.³

Hantaviruses can also cause hemorrhagic fever with renal syndrome (HFRS), which primarily affects the kidneys. HFRS can become severe and occasionally fatal, with symptoms such as intense headaches, abdominal and back pain, blurred vision, low blood pressure, and nausea developing within 1 to 2 weeks after exposure.³

Most hantaviruses are not known to spread from person to person. However, the Andes virus—identified in the current outbreak aboard the MV Hondius—is one of the only hantavirus strains confirmed to transmit between humans under certain conditions. That distinction has contributed to heightened concern among international health authorities monitoring the outbreak.²

In response, cruise operators and health agencies have reportedly increased sanitation protocols, including deep-cleaning high-touch surfaces, inspecting ventilation systems, and restricting movement in potentially affected areas of the ship. Medical teams on board are also using rapid symptom screening to identify suspected cases early and reduce further exposure risk among passengers and crew.

Although there is currently no specific cure or antiviral treatment for hantavirus infections, immediate medical care can improve patient outcomes. Prevention remains the most effective strategy. Health officials recommend minimizing exposure to rodents and their droppings, properly ventilating enclosed spaces, and using protective equipment and bleach-based cleaning solutions when handling potentially contaminated areas.³

References

1. Risemberg A, Apawu M, Furtula A, DeBre I. Cruise ship with hantavirus outbreak heads to Canary Islands after 3 are evacuated. AP News. May 6, 2026. Accessed May 7, 2026. https://apnews.com/article/cruise-ship-hantavirus-andes-strain-south-africa

2. Bryan SM. What to know about hantavirus, the illness linked to a cruise ship outbreak. AP News. May 7, 2026. Accessed May 7, 2026. https://apnews.com/article/what-to-know-hantavirus-cruise-ship

3. About hantavirus. CDC. May 13, 2024. Accessed May 7, 2026. https://www.cdc.gov/hantavirus/about/index.html