Cruise Ship Linked to Hantavirus Cluster: WHO Reports 11 Cases and 3 Deaths
A cluster of severe respiratory illnesses linked to passengers aboard a cruise ship has prompted an international health response, with the World Health Organization (WHO) reporting 11 cases and three deaths as of May 13, 2026.
The outbreak centers on the MV Hondius, a Dutch-flagged vessel. According to the WHO, the organization was first notified of the cluster on May 2, 2026, after reports of critically ill passengers and initial fatalities. As the investigation progressed, the number of affected individuals grew, with the most recent updates confirming new cases in France and Spain. One case in the United States currently remains inconclusive and is undergoing further diagnostic testing.
Of the 11 reported cases, eight have been laboratory-confirmed as infections of the Andes virus (ANDV), while two are considered probable. The outbreak has seen a case fatality rate of 27%, with three deaths recorded—two confirmed and one probable.
The identification of the Andes virus is particularly significant for public health officials. While most hantaviruses are zoonotic—meaning they jump from animals to humans—the Andes virus is the only known strain capable of limited human-to-human transmission among close contacts. Most hantavirus infections occur through contact with infected rodents or their saliva, urine, and droppings.
Health authorities are currently conducting international contact tracing to contain the spread. Despite the severity of the individual cases, the WHO has assessed the overall risk to the global population as low. This assessment underscores the importance of rigorous surveillance in identifying rare viral jumps before they can escalate into wider public health threats.
Hantaviruses generally cause two distinct syndromes depending on the region and virus type. In the Americas, the virus often leads to hantavirus cardiopulmonary syndrome (HCPS), a rapidly progressing illness that affects the heart and lungs. In contrast, strains found in Europe and Asia typically cause hemorrhagic fever with renal syndrome (HFRS), which primarily targets the kidneys and blood vessels.
Medical experts emphasize that while there is no specific cure for hantavirus, early supportive care is essential for survival. Treatment focuses on close clinical monitoring and the management of cardiac, respiratory, and kidney complications.
