Hantavirus Outbreak: Transmission, Prevention & Latest Updates on Person-to-Person Spread

A deadly outbreak of the Andes strain of hantavirus aboard the Dutch-flagged cruise ship MV Hondius has prompted a global health alert, as the rare virus—known for its ability to spread between humans—has sickened at least seven passengers and crew, with three fatalities and one in critical condition. The ship, which departed Ushuaia, Argentina, on March 20, 2026, for the Canary Islands via Cabo Verde, has become the focus of an international response to contain the spread of a pathogen usually associated with rodent transmission.

The World Health Organization (WHO) and the European Centre for Disease Prevention and Control (ECDC) confirmed on May 6, 2026, that the Andes strain, the only known variant of hantavirus capable of person-to-person transmission, is responsible for the outbreak. The ship’s voyage has been marked by severe respiratory illness among passengers, including three deaths and one critically ill patient, while two others are symptomatic and one case remains under investigation. The outbreak has raised alarms due to the unique mode of transmission, which contrasts with the typical rodent-borne spread of other hantavirus strains.

The Andes strain was first identified in 1996 following a deadly cluster in Argentina, where 11 people died at a birthday party. Experts emphasize that while the risk of a pandemic is currently low, the outbreak underscores the need for vigilance, especially in enclosed spaces like cruise ships where close contact is inevitable. The WHO and regional health agencies are coordinating a response that includes isolating confirmed cases, tracing contacts, and enhancing surveillance to prevent further spread.

The cruise ship MV Hondius, carrying 147 passengers and crew, was initially diverted to Cabo Verde for medical evaluation and quarantine measures. Three critically ill passengers were transferred to land-based hospitals for treatment, while the ship itself remains under strict health protocols to prevent further transmission. Health authorities have advised against unnecessary travel and are urging those who may have been exposed to monitor for symptoms, which include fever, muscle aches, and severe respiratory distress.

According to the UK Health Security Agency (UKHSA), the Andes strain’s ability to spread between humans is a key concern, though experts stress that the overall risk to the general public remains low. The outbreak serves as a reminder of the importance of robust public health measures, particularly in international travel and confined environments. As investigations continue, health officials are urging travelers and the public to stay informed and adhere to advisories issued by national and international health bodies.

For more information on hantavirus symptoms and prevention, the WHO and CDC recommend consulting official health guidelines and seeking medical attention if symptoms develop after potential exposure.