Hantavirus Cruise Ship Outbreak: Dozens of Passengers Tracked Across Four Continents After Three Deaths

Hantavirus Cruise Ship Crisis Sends Health Authorities Into Global Contact-Tracing Emergency

Health officials spanning four continents are urgently working to locate and monitor passengers who departed a hantavirus-infected cruise ship before the deadly outbreak was formally identified — a race against time made more complicated by the virus's incubation period of one to eight weeks.

Oceanwide Expeditions, the Netherlands-based operator of the MV Hondius, confirmed Thursday that 30 passengers — including one who had already died and his wife — disembarked at the remote South Atlantic island of St. Helena on April 24. That departure occurred nearly two weeks before health authorities were able to officially confirm hantavirus aboard the vessel. The Dutch Foreign Ministry, however, places the number of disembarked passengers closer to 40.

Three Fatalities and a Widening Investigation

The outbreak has now claimed three lives: a Dutch man who became the first fatality on April 11, his wife who later died in South Africa, and a German woman who passed away on May 2. Her body remains on the ship. Several other passengers are currently ill, and the confirmed cases involve at least five individuals testing positive for the Andes virus — a rare South American strain of hantavirus and the only known type capable of spreading from person to person.

The Dutch man's wife disembarked at St. Helena along with other passengers on April 24, flew to South Africa the following day, and died there shortly after. During her brief time on a flight in Johannesburg, a flight attendant was reportedly exposed. Dutch health authorities announced Thursday that the attendant is now showing hantavirus symptoms and is being tested in an isolation ward at an Amsterdam hospital. If confirmed, she would become the first known infection outside the MV Hondius linked to this outbreak.

Passengers Scattered Across the Globe Without Contact Tracing

The core challenge facing international health teams is that the more than two dozen passengers who left the ship at St. Helena — representing at least 12 nationalities — did so without any contact tracing protocols in place. The hantavirus diagnosis wasn't confirmed in a ship passenger until May 2, when a British man evacuated to South Africa tested positive.

Singaporean health authorities announced Thursday they are isolating and testing two men who disembarked at St. Helena, flew to South Africa, and subsequently returned home to Singapore at different times. In Switzerland, a man who also left the ship at St. Helena has already tested positive, though his movements in the intervening period remain unclear.

Authorities on St. Helena are monitoring a small group classified as higher-risk contacts, instructing them to isolate for a period of 45 days.

France also reported Thursday that a French citizen displaying mild symptoms has been placed in isolation after being identified as a contact of a ship passenger who flew from St. Helena to Johannesburg on April 25 — the same flight that carried the Dutch woman who later died.

Argentina at the Center of the Outbreak Investigation

Investigators are focusing their search for the outbreak's origin on Argentina, where the MV Hondius began its voyage. The Dutch couple who were the outbreak's first two cases had traveled through Argentina, Chile, and Uruguay before boarding the ship, visiting areas known to harbor the species of rodent that carries the Andes virus.

Argentina's Health Ministry has narrowed its investigation to Ushuaia, a southern city located roughly 3.5 hours by air from Buenos Aires. Scientists from the state-funded Malbrán Institute are expected to travel there in the coming days to collect and analyze rodents at a local garbage site for the presence of Andes virus. Officials suspect the Dutch couple may have contracted the virus during a bird-watching excursion in the region before embarking on their cruise.

WHO Calls for International Solidarity

The World Health Organization stressed Thursday that the broader public health risk remains low. Hantavirus is primarily transmitted through inhalation of contaminated rodent droppings and does not spread easily between humans — though the Andes variant is a notable exception.

"We believe this will be a limited outbreak if the public health measures are implemented and solidarity is shown across all countries," said Dr. Abdirahman Mahamud, the WHO's director of alert and response.

WHO Director-General Tedros Adhanom Ghebreyesus added that he had been in direct contact with the ship's captain, noting that crew and passenger morale had lifted once the vessel resumed movement.

Three people, including the ship's doctor, were evacuated Wednesday near the West African island nation of Cape Verde and transported to specialized European medical facilities. The MV Hondius is currently en route to Spain's Canary Islands, where it is expected to dock between Saturday and Sunday, with more than 140 passengers and crew still on board. None of them are currently showing symptoms, the cruise operator confirmed.