A suspected hantavirus outbreak linked to the expedition cruise ship MV Hondius has triggered international health monitoring efforts after several passengers fell critically ill and three people died during the voyage. Health authorities across Europe, Asia, Africa, and North America are now tracing passengers and monitoring possible infections as the vessel heads toward Spain’s Canary Islands.
The outbreak has drawn global attention because passengers from the ship had already dispersed to several countries before the virus was fully identified, prompting comparisons to the early stages of the COVID-19 pandemic. However, the World Health Organization (WHO) has emphasized that the current risk does not resemble a large-scale pandemic scenario.
The MV Hondius, operated by Oceanwide Expeditions, departed Argentina last month for a bird-watching and expedition-style cruise. During the voyage, multiple passengers began experiencing severe flu-like symptoms including fever, headaches, abdominal pain, and diarrhea.
The first suspected case involved a 70-year-old Dutch passenger who became seriously ill onboard and died on April 11. Since then, two additional deaths have been confirmed, including another Dutch national and a German passenger. Several others remain hospitalized or under medical observation in different countries.
The outbreak has been linked to the Andes strain of hantavirus, a rare but potentially dangerous virus known for its ability, in some cases, to spread through close human contact. Scientists believe the infected passengers may have contracted the virus during sightseeing activities in Argentina before boarding the ship.
Health agencies around the world are actively tracing passengers and monitoring potential exposures linked to the cruise.
The Netherlands
Authorities in the Netherlands are currently treating multiple passengers connected to the ship, including a British national, a German passenger, and a Dutch crew member. Two of them are reportedly in serious condition.
Dutch officials are also testing another individual who may have been exposed indirectly through contact with one of the deceased passengers.
South Africa
A British passenger who became ill onboard was transferred to a hospital in Johannesburg, where he remains in intensive care. WHO officials have stated that his condition is gradually improving.
Switzerland
A passenger who returned to Switzerland after leaving the vessel tested positive for hantavirus and is currently receiving treatment in Zurich.
United Kingdom
British health authorities confirmed that several UK nationals who disembarked from the cruise at Saint Helena are isolating at home as a precautionary measure. Contact tracing efforts are continuing for additional passengers connected to the voyage.
United States
Health officials in the United States are monitoring multiple former passengers who returned to states including Georgia and Arizona. Authorities said those individuals are currently asymptomatic. Reports also suggest that other American travelers returned to Texas and Virginia.
Singapore
Singapore’s Communicable Diseases Agency stated that two men in their 60s are self-isolating and undergoing testing. One individual reportedly developed mild symptoms, while the other remains symptom-free.
What Is Hantavirus?
Hantavirus is a rare viral disease primarily spread through contact with infected rodents, especially their urine, droppings, or saliva. The Andes strain, identified in this outbreak, is particularly concerning because it has shown limited potential for human-to-human transmission in close-contact situations.
Symptoms often begin like the flu but can rapidly progress into severe respiratory complications and organ failure in serious cases. The incubation period can range from one to six weeks, making it difficult to quickly identify and isolate infections.
Despite growing international concern, the World Health Organization has stressed that there is currently no evidence suggesting widespread transmission or pandemic-level risk.
WHO officials acknowledged that additional cases may emerge due to the long incubation period and the movement of passengers across countries. However, experts believe the outbreak remains limited and manageable through monitoring, testing, and international coordination.
The organization is now working with multiple governments to conduct international contact tracing and reduce the risk of further spread.
The MV Hondius is expected to arrive in Tenerife in Spain’s Canary Islands, where remaining passengers and crew members will finally disembark under strict health protocols.
According to Oceanwide Expeditions, approximately 146 passengers and crew members from 23 countries remain onboard under precautionary measures while authorities continue monitoring the evolving situation.
