Health officials are currently probing a suspected hantavirus outbreak aboard the cruise ship MV Hondius, which was journeying across the Atlantic Ocean from Argentina to Cape Verde. Three passengers have died, one infection has been confirmed, and five additional cases are under examination.
In a significant development, detailed laboratory analyses are underway to verify further infections and identify the outbreak’s origin. This incident has raised alarm due to hantavirus’s usual transmission from rodents and the uncommon nature of human-to-human spread.
Hantavirus is a group of viruses primarily carried by rodents. Humans typically contract the virus by inhaling airborne particles contaminated with dried urine, droppings, or saliva from infected rodents. In rare instances, transmission can also occur through rodent bites or scratches.
The virus can cause two severe illnesses. The first, Hantavirus Pulmonary Syndrome (HPS), begins with flu-like symptoms such as fever, fatigue, and muscle aches, progressing to severe respiratory distress. Once lung complications develop, the mortality rate can reach approximately 38 percent. The second illness, Hemorrhagic Fever with Renal Syndrome (HFRS), mainly affects the kidneys and can result in low blood pressure, internal bleeding, and kidney failure in critical cases.
Globally, hantavirus infections are relatively rare but widespread. Several thousand HFRS cases occur annually, predominantly in parts of Asia and Europe, especially China. In the United States, fewer than 1,000 cases have been documented since national surveillance began in the early 1990s. Notably, strains like the Seoul virus, carried by Norway rats, are present in urban areas worldwide.
Currently, no specific antiviral treatment exists for hantavirus infections. Medical care focuses on supportive therapies, including oxygen administration, intensive care, ventilation support, or dialysis for severe cases. Experts emphasize prevention as the most effective approach, recommending avoidance of rodent contact, sealing entry points in homes, and using protective gear when cleaning potentially contaminated areas.
Recent cases highlight the ongoing risks posed by hantavirus. In 2025, an HPS-related infection was linked to the death of Betsy Arakawa, wife of actor Gene Hackman, in the United States. Investigations revealed rodent activity near her home, underscoring how domestic exposure remains a serious health threat even in developed countries.
Meanwhile, the current outbreak on the cruise ship has drawn renewed attention to the virus and the critical importance of early detection and stringent hygiene protocols in confined environments.
