Hantavirus Outbreak on Cruise Ship Triggers Global Health Alert as Infected Vessel Heads to Canary Islands

Health authorities across several countries are racing to trace passengers and contain a possible international health scare after a cruise ship carrying people infected with hantavirus continued its journey toward Spain’s Canary Islands.

The vessel, carrying more than 140 passengers and crew members, is expected to arrive at Tenerife early Sunday.

At least three passengers have already died, while several others are reported to have contracted the virus, raising concerns among governments and public health agencies about possible exposure across multiple countries.

Even as authorities in Europe, South America, and Africa coordinate emergency measures, several critical questions surrounding the outbreak remain unanswered — including where the infection began, how many people may have been exposed, and where all the passengers who disembarked earlier are currently located.

What is hantavirus?

Hantavirus is a rare but potentially deadly viral disease primarily spread through contact with infected rodents, especially through inhalation of particles from rodent urine, saliva, or droppings.

The virus can cause severe respiratory illness and, in some cases, kidney complications. Early symptoms often resemble the flu and may include fever, fatigue, muscle pain, headaches, and dizziness.

As the illness progresses, patients can develop breathing difficulties, low blood pressure, and fluid accumulation in the lungs, which can become life-threatening.

According to the World Health Organization, hantavirus is generally not considered highly contagious between humans. Most infections occur through environmental exposure rather than direct person-to-person transmission.

However, scientists have expressed concern about the Andes strain of hantavirus — believed to be linked to the cruise ship outbreak — because some studies suggest it may, in rare circumstances, spread between people through close contact.

Health experts say symptoms can appear anywhere from one to eight weeks after exposure, making contact tracing especially challenging in international travel situations.

How the outbreak may have started

Investigators in Argentina believe a Dutch couple may have unknowingly contracted the virus during a bird-watching excursion before boarding the cruise ship on April 1.

However, officials have not yet confirmed exactly where or how the infection began.

Argentina’s Health Ministry is focusing its investigation on Ushuaia, the southernmost city in the country and one of the key departure points for Antarctic and South Atlantic cruises.

Authorities are expected to travel there in the coming days as part of the ongoing inquiry.

The uncertainty surrounding the origin of the outbreak has complicated international efforts to determine how far the virus may have spread before the first cases were detected.

Three deaths and growing concern onboard

The outbreak first drew global attention after multiple passengers fell ill during the voyage.

One of the earliest fatalities involved a Dutch passenger who died while the ship was still at sea. His wife later disembarked carrying his body when the vessel stopped at the remote South Atlantic island of Saint Helena on April 24.

At that stage, however, hantavirus had not yet been officially confirmed.

It was only on May 2 that health authorities publicly identified hantavirus in a passenger aboard the ship — nearly two weeks after several travelers had already left the vessel and dispersed internationally.

The delay has since triggered a frantic multinational effort to identify and track potentially exposed individuals.

The Dutch woman later travelled onward to Johannesburg and briefly boarded a flight bound for Amsterdam.

However, airline staff reportedly removed her from the aircraft after her condition worsened significantly. She later died.

Authorities in both South Africa and the Netherlands are now attempting to trace everyone who may have come into contact with her during her travels, including airport personnel and fellow passengers.

A flight attendant who interacted with the woman reportedly experienced symptoms but later tested negative for hantavirus.

International contact-tracing operation underway

Officials say more than two dozen passengers from at least 12 countries disembarked from the ship at Saint Helena before the virus outbreak was publicly known.

Among them was a resident of the isolated British territory of Tristan da Cunha, who has since been hospitalised with symptoms linked to hantavirus.

Stephen Doughty confirmed that British authorities were monitoring the situation closely and expressed support for the affected island resident and their spouse, who is currently isolating.

Despite ongoing tracing efforts, officials still do not know the precise movements of every passenger who left the vessel earlier in the voyage.

Some travellers reportedly continued onward to different countries before health alerts were issued.

Several governments, including the United Kingdom, have confirmed the locations of their citizens who left the cruise ship.

However, authorities have not disclosed how many people those passengers may have interacted with since disembarking.

Spain prepares an emergency response.

Spanish authorities are now preparing for the ship’s arrival in Tenerife under strict medical supervision.

Officials said passengers would not be allowed to disembark freely. Instead, they will reportedly be transferred in small boats before being moved directly to waiting buses and repatriation flights arranged by their home countries.

The United States and the United Kingdom have already agreed to send aircraft to evacuate their citizens from the Canary Islands.

Spain has also requested specially equipped medical aircraft for passengers who are showing symptoms or require medical observation during transport.

Emergency officials in Spain said extensive precautions are being taken to minimise any risk of wider transmission while ensuring the safe evacuation of those on board.

Low public risk, but unanswered questions remain.n

Despite growing international concern, the World Health Organization continues to maintain that the overall risk to the wider public remains low.

Still, the incident has highlighted how quickly infectious diseases can become international emergencies in an age of global travel — especially when symptoms take days or even weeks to appear.

For now, health agencies across multiple continents remain focused on one urgent task: locating everyone who may have come into contact with infected passengers before the outbreak was detected.