What began as a luxury Antarctic expedition aboard the MV Hondius has transformed into a closely watched international health incident following a deadly hantavirus outbreak. Three individuals – a Dutch couple and a German national – have died since the vessel departed Argentina last month, prompting a global alert and monitoring efforts across multiple continents.
The World Health Organization (WHO) confirmed on May 7, 2026, that five confirmed hantavirus infections have been identified among people connected to the cruise ship. Authorities are now scrambling to trace passengers who dispersed globally before the full scope of the outbreak was understood, leading to monitoring or treatment in countries including the United States, Singapore, the United Kingdom, Switzerland, South Africa, and the Netherlands.
Outbreak Unfolds on MV Hondius
The first suspected case involved a 70-year-old Dutch passenger who developed severe symptoms, including fever, headache, abdominal pain, and diarrhea, while onboard. He tragically died on the vessel on April 11. His wife later succumbed to the illness after being medically evacuated to South Africa. A German passenger also died during the voyage.
Oceanwide Expeditions, the ship's operator, reported that 146 passengers and crew members from 23 countries remained onboard under “strict precautionary measures.” While some passengers disembarked earlier at Saint Helena, others were airlifted to Europe for emergency treatment. The remaining passengers are expected to arrive in Spain's Canary Islands this weekend for repatriation under medical supervision.
International Response and Monitoring
- Netherlands: Three people, including a British passenger, a German national, and a Dutch crew member, have arrived in the Netherlands for treatment, with two reportedly in serious condition. Dutch authorities are also testing a KLM airline crew member in Amsterdam for possible exposure.
- South Africa: A British national who fell ill onboard was transferred to intensive care in Johannesburg. South African authorities were among the first to identify the suspected Andes strain of hantavirus, notable for its human-to-human transmission capability.
- Switzerland: WHO Director-General Tedros Adhanom Ghebreyesus confirmed on May 6 that a passenger returning to Switzerland tested positive and is undergoing treatment in Zurich.
- United Kingdom: Two British nationals who disembarked at Saint Helena are self-isolating. Officials are monitoring five more British nationals, and contact tracing continues for another passenger yet to return to the UK.
- United States: US health authorities are monitoring at least three individuals who returned home. Residents in Georgia and Arizona are under observation but remain symptom-free. Reports suggest other American passengers have returned to Texas and Virginia.
- Singapore: Singapore’s Communicable Diseases Agency is monitoring two men in their 60s who are self-isolating and undergoing testing. One has developed a runny nose, while the other remains asymptomatic.
Why the Global Alert?
Hantavirus is typically transmitted through exposure to infected rodent urine, saliva, or droppings and is not generally highly contagious between humans. However, the suspected Andes strain has alarmed health authorities because it is the only known variant capable of limited person-to-person spread.
The fact that passengers disembarked and traveled internationally before the outbreak was fully recognized has drawn comparisons to the early days of the COVID-19 pandemic. Experts, however, emphasize that the overall public health risk from this hantavirus outbreak remains significantly lower. Oceanwide Expeditions is actively attempting to trace all passengers and crew who embarked and disembarked since March 20 amidst fears of wider dissemination.