Why Hantavirus Outbreak On A Polar Cruise Has Scientists Worried About Antarctica Tourism

Last Updated:May 11, 2026, 12:56 IST

Hantavirus outbreak aboard a polar cruise has put fresh scrutiny on Antarctica’s tourism boom, with scientists questioning how much human activity the frozen frontier can handle.

A hantavirus outbreak linked to the Antarctica-bound expedition cruise ship MV Hondius has triggered fresh concerns among scientists, conservationists and public health experts over the rapid growth of tourism to one of the world’s most fragile ecosystems.

The outbreak, which prompted international passenger tracing efforts and renewed scrutiny of cruise-based polar tourism, has also reignited debate around whether Antarctica can safely handle the sharp rise in “last chance tourism", where travellers rush to see climate-threatened landscapes before they change irreversibly.

From disease transmission risks to pressure on wildlife habitats, scientists warn that Antarctica’s tourism boom is creating challenges that existing safeguards may no longer be equipped to handle.

Why Is Antarctica Tourism Growing So Rapidly?

Antarctica was once considered one of the world’s most inaccessible destinations, visited mainly by scientists and specialised expeditions. But in recent years, the continent has increasingly become a premium adventure tourism hotspot.

A major reason behind this surge is what experts describe as “last chance tourism" — travel motivated by the fear that climate change could permanently alter or destroy natural landscapes.

Tourists are increasingly travelling south to witness glaciers, penguin colonies, icebergs, whales and vast frozen landscapes before global warming transforms them irreversibly.

“The sites you will see in Antarctica are extremely unique and not replicable anywhere else on the planet — the whales, the seals, the penguins, the icebergs — it’s all really stunning and it makes a huge impression on people," Claire Christian, executive director of the environmental group Antarctic and Southern Ocean Coalition, told AP.

Most Antarctic expeditions focus on the Antarctic Peninsula, one of the fastest-warming regions on Earth. According to NASA data, Antarctica lost roughly 149 billion metric tons of ice annually between 2002 and 2020.

The growth in tourism has been dramatic. According to the International Association of Antarctica Tour Operators (IAATO), more than 80,000 tourists physically landed in Antarctica in 2024, while another 36,000 viewed the continent from ships.

The International Union of Concerned Scientists estimates tourism to Antarctica has increased tenfold over the past 30 years.

Experts believe the numbers may rise even faster in the coming decade as polar cruise technology improves and more ice-capable vessels enter service.

Hanne Nielsen, a senior lecturer of Antarctic law at the University of Tasmania, told AP that projections by her colleagues suggest annual visits could eventually rise to more than 400,000.

Why Has The Hantavirus Outbreak Intensified Concerns?

The recent hantavirus outbreak aboard the Dutch expedition ship MV Hondius has sharpened concerns about the risks associated with increased tourism to remote ecosystems.

According to the World Health Organization (WHO), the vessel departed Ushuaia in Argentina on April 1 and travelled through Antarctica and several isolated South Atlantic islands before the outbreak came to light.

The ship reportedly carried passengers and crew from 23 countries.

Health authorities are investigating the outbreak, including the possibility of limited human-to-human transmission. The current outbreak is believed to involve the Andes strain of hantavirus — the only known hantavirus capable of limited person-to-person spread.

WHO’s director of epidemic and pandemic preparedness, Dr Maria Van Kerkhove, said officials suspect the first infected person likely contracted the virus before boarding the ship. Authorities have also reportedly been informed that there were no rats aboard the vessel.

Hantavirus usually spreads through exposure to contaminated rodent droppings.

Although officials have not confirmed contamination originating from Antarctica itself, researchers say the outbreak demonstrates how expedition tourism can complicate disease monitoring and international public health coordination.

Experts warn that cruise tourism can unintentionally introduce pathogens, invasive species and pollutants into ecosystems with limited natural defences.

Researchers also note that cruise voyages create conditions where illnesses can spread rapidly because passengers remain in close quarters while travelling across multiple international jurisdictions.

The outbreak has also revived comparisons with the Covid-19 pandemic period, when cruise ships became associated with rapid onboard transmission. In 2020, the Diamond Princess cruise ship became one of the world’s earliest major Covid-19 outbreak clusters.

Cruise ships have also experienced outbreaks of diseases such as norovirus, which spreads quickly in confined environments.

Why Are Scientists Especially Concerned About Antarctica?

Scientists say Antarctica’s ecological vulnerability makes the risks particularly serious.

Unlike heavily populated regions that regularly interact with outside ecosystems, Antarctica evolved in relative isolation for millions of years. Even small external disruptions can therefore have outsized environmental consequences.

One major concern involves biological contamination.

In recent years, migratory birds carried avian flu from South America into Antarctica, according to the US Centers for Disease Control and Prevention (CDC). The spread raised fears about how external diseases could threaten wildlife populations that have little resistance to unfamiliar pathogens.

Environmental experts say tourism increases the possibility of accidentally transporting microbes, seeds, insects or contaminants into the region.

To minimise such risks, strict biosecurity rules are already enforced for visitors heading south.

“There are rules that people are bound by when they’re heading south," Nielsen told AP.

She described how crews and passengers use vacuums, disinfectants and brushes to clean boots and equipment to remove dirt, seeds, feathers and microbes before landings.

“Between the tongues and the laces of the boots you can find a lot of things," she said.

Tourists are also instructed not to touch wildlife and to avoid placing equipment on the ground unnecessarily.

But some researchers worry that even stringent cleaning measures may become harder to enforce consistently as visitor numbers continue rising.

Claire Christian warned that Antarctica’s ecological sensitivity requires stronger oversight. “Activity needs to be regulated appropriately, as you would with any of the world’s sensitive and precious ecological sites," she said.

What Is The Antarctic Treaty?

The growing tourism debate has also renewed attention on the Antarctic Treaty system that governs the continent.

Signed in 1959, the Antarctic Treaty designated Antarctica as a scientific preserve reserved for peaceful purposes.

Over time, additional environmental rules and protocols were introduced to reduce ecological damage and regulate human activity.

According to the treaty secretariat, the rules aim to ensure that visits “do not adversely impact the Antarctic environment or its scientific and aesthetic values".

Tour operators and scientific expeditions are expected to follow biosecurity protocols and submit environmental impact assessments.

However, some experts argue that the treaty framework was developed during a period when Antarctica received far fewer visitors.

As luxury expedition cruises become more common, researchers and conservation groups say existing safeguards may struggle to keep pace with the scale of modern tourism activity.

Could Antarctica Tourism Face Tougher Rules Ahead?

For now, demand for Antarctic tourism continues to rise despite mounting concerns.

Luxury expedition voyages through Antarctica, South Georgia and remote Atlantic islands remain highly sought-after experiences, often costing thousands of dollars per passenger.

But the hantavirus outbreak has intensified discussions about whether stricter controls may soon become unavoidable.

Scientists and environmental groups argue that Antarctica’s unique ecological importance leaves little room for error. “You can put a footprint in Antarctica and it’s still there 50 years later," Christian said.

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