The World Health Organization (WHO) has officially declared the hantavirus outbreak on the cruise ship MV Hondius to be over following the release of the last quarantined individual. The outbreak, which generated international concern, resulted in 12 confirmed cases and one probable infection, including three fatalities.
The MV Hondius, a Dutch-flagged polar exploration vessel, departed from Ushuaia, Argentina, on April 1. Its itinerary included stops at various islands in the South Atlantic Ocean, such as Tristan da Cunha, before traveling northward to Tenerife in the Canary Islands, Spain. Remaining passengers were evacuated in Tenerife, and the ship ultimately docked in Rotterdam, the Netherlands, on May 18. After thorough cleaning and disinfection, the vessel was cleared to resume sailing on May 30.
WHO Director-General Tedros Adhanom Ghebreyesus announced that the final individual exposed to hantavirus on the ship had completed quarantine, tested negative, and returned home, with no new cases reported since May 25. The agency identified and monitored more than 650 contacts in 33 countries and territories as part of the containment efforts.
Hantavirus is a rare virus transmitted primarily by rodents. The strain involved in this outbreak, the Andes virus, is unique in its ability to spread from human to human. Initial reports suggested that a passenger contracted the virus while traveling in areas of Argentina where hantavirus is endemic. However, an investigation by Argentina’s health ministry in a secondary province did not identify any virus-carrying rodents, leaving some questions about the outbreak’s precise origins.
Diana Rojas Alvarez, WHO’s chief for high-impact epidemics, emphasized that while the outbreak no longer poses a public health risk, hantavirus remains a significant concern in South America and other regions where it is endemic. She stressed the importance of ongoing monitoring and preparedness for future outbreaks.
The WHO is coordinating a study across 21 countries aimed at advancing understanding of hantavirus disease progression. This research is expected to aid development of improved diagnostics, treatments, and vaccines to better manage potential future outbreaks.
Despite the conclusion of this episode, scientists and public health officials continue to analyze the outbreak carefully to derive lessons that could inform response strategies for hantavirus and other emerging infectious diseases.