Americans Quarantined in Nebraska After Hantavirus Exposure on Ship

On May 11, 2026, a U.S. government repatriation flight touched down at Offutt Air Force Base outside Omaha, Nebraska, carrying 18 Americans who had been pulled off a cruise ship in Spain's Canary Islands. Within hours, they were inside 300-square-foot rooms equipped with negative air pressure ventilation, exercise equipment, and small refrigerators — the clinical comforts of the National Quarantine Unit at the University of Nebraska Medical Center [1][2]. None of them were sick. All of them were told they might have to stay for up to 42 days.

The passengers had been aboard the MV Hondius, a Dutch-flagged expedition vessel operated by Oceanwide Expeditions that left Ushuaia, Argentina, on April 1 with 114 passengers and 61 crew bound for Antarctica, South Georgia, and a chain of remote South Atlantic islands [3]. By early May, passengers were falling ill with severe respiratory symptoms. Three would die. The cause: the Andes strain of hantavirus, a rodent-borne pathogen rarely seen outside South America — and the only hantavirus known to spread, in rare instances, from person to person [4][5].

The Outbreak on the MV Hondius

The World Health Organization was notified on May 2 of a cluster of severe respiratory illness aboard the ship [3]. By May 6, Argentine and Dutch laboratories had confirmed the Andes orthohantavirus [4]. As of May 21, the WHO reported 11 total cases — 9 confirmed and 2 probable — with 3 deaths, including 2 confirmed as caused by the Andes virus [3][5].

Source: WHO / ECDC Reports

Data as of May 21, 2026CSV

The ship's itinerary had taken passengers through ecologically diverse and remote regions, including mainland Antarctica, South Georgia, Nightingale Island, Tristan da Cunha, Saint Helena, and Ascension Island [3]. Health authorities believe that rodent contact or exposure to nesting material at one or more of these stops introduced the virus, though the precise exposure point remains under investigation. Once aboard, at least some transmission appears to have occurred between passengers — a pattern consistent with the Andes strain's documented, if rare, capacity for human-to-human spread [4][5].

The MV Hondius docked in Rotterdam on May 18, where remaining passengers were retested and 23 crew members from four countries entered quarantine in the Netherlands [3]. Ship sanitation is underway. Since disembarkation, additional cases have been confirmed in France, Spain, and Canada among former passengers [6].

Who Is Quarantined — and Why Nebraska

Of the 18 Americans repatriated, 16 were housed at the National Quarantine Unit, with one passenger at Nebraska Medicine's biocontainment unit and a 17th person already released [1][7]. Seven additional U.S. passengers who returned home earlier are being monitored by state and local health departments [8].

None of the 18 were showing symptoms upon arrival in Omaha [2]. The 42-day monitoring period reflects hantavirus's incubation window of one to eight weeks; health officials set the quarantine to cover the outer bound [9].

Nebraska was chosen because it is home to the only federally funded quarantine unit in the United States [1]. The facility, which opened in late 2019 as part of the Training, Simulation, and Quarantine Center at UNMC, was built with a nearly $20 million grant from the Department of Health and Human Services' Administration for Strategic Preparedness and Response [10]. It occupies an entire floor of the $119 million Davis Global Center and contains 20 single-occupancy rooms with negative air pressure systems and specialized waste sterilization [10][2]. The facility previously housed Americans evacuated during the early days of the COVID-19 pandemic and individuals exposed to Ebola [10].

The United States maintains 20 CDC quarantine stations, all located at major ports of entry — airports and land border crossings [11]. But these stations are administrative outposts staffed to screen travelers and issue orders, not residential facilities designed for extended stays. For comparison, Australia operates a dedicated quarantine facility at Howard Springs near Darwin with a capacity of over 2,000, originally built for mining workers and repurposed during COVID-19 [11]. Canada relies on designated quarantine hotels and military bases. The U.S. system, by contrast, has a single 20-bed facility designed for high-consequence pathogens, raising questions about surge capacity if a larger maritime exposure event were to occur.

A Virus with a 35% Kill Rate — and No Treatment

Hantavirus pulmonary syndrome (HPS) is one of the most lethal infectious diseases endemic to the United States. The CDC reports a case fatality rate of approximately 35-40%, meaning nearly 4 in 10 people who develop symptoms die [12]. From 1993 through 2023, roughly 890 laboratory-confirmed HPS cases were reported nationwide, with annual case counts typically ranging from 15 to 40, concentrated in the western states and the Four Corners region [12][13].

Source: CDC Surveillance Data

Data as of Jan 1, 2026CSV

Ship-based hantavirus exposure is virtually without precedent in U.S. public health history. Nearly all documented American cases trace to land-based rodent contact — cleaning out sheds, cabins, or agricultural buildings where deer mice or other carriers left droppings and urine [12]. The MV Hondius outbreak represents a novel scenario: a concentrated exposure event in a confined vessel, involving a strain (Andes) not typically found in the Northern Hemisphere.

There is no FDA-approved antiviral treatment for hantavirus and no vaccine [8][12]. This raises a pointed question about the medical purpose of quarantine beyond observation. In practical terms, the quarantine enables early detection of symptoms so that patients can receive aggressive supportive care — mechanical ventilation, fluid management, extracorporeal membrane oxygenation (ECMO) in severe cases — which can improve survival if started promptly [12]. But there is no specific therapy to administer. The quarantine is, functionally, a waiting room.

The Legal Authority: SARS by Another Name

The CDC's quarantine orders rest on section 361 of the Public Health Service Act (42 U.S.C. § 264) and implementing regulations at 42 CFR parts 70 and 71, which authorize the federal government to detain and medically examine individuals to prevent the spread of communicable diseases [11][14].

There is a catch. Federal quarantine authority extends only to diseases listed in a presidential executive order. The current list, last updated in July 2014 by President Barack Obama, includes cholera, diphtheria, plague, smallpox, yellow fever, viral hemorrhagic fevers, SARS, and "severe acute respiratory syndromes" capable of person-to-person transmission and with pandemic potential or high mortality [14][15].

Hantavirus — no strain of it — appears on that list [15].

The CDC's workaround: classify the Andes hantavirus as a form of "severe acute respiratory syndrome." The virus does cause severe respiratory failure, it has demonstrated person-to-person transmission, and it carries high mortality. By the literal words of the 2014 executive order, the argument has a surface plausibility [15].

But James Hodge Jr., director of the Center for Public Health Law and Policy at Arizona State University, told Healthbeat that the classification is legally vulnerable. "That's not typically how the term is applied," he said of the SARS label being stretched to cover hantavirus [15]. The term "SARS" was added to the quarantinable disease list in response to the 2003 SARS-CoV-1 outbreak and later broadened to cover SARS-CoV-2. Applying it to a hantavirus is without precedent.

Hodge noted a simpler path exists: "President Trump could issue that order in the next five minutes," adding hantavirus to the quarantinable disease list and eliminating the legal uncertainty [15]. As of May 22, no such order has been issued.

"I Feel Betrayed": The Due Process Question

Angela Perryman, 47, who primarily resides in Ecuador, was among the 18 Americans evacuated to Nebraska. She told NPR that federal officials initially described the quarantine as voluntary [16]. Then, on May 18, she received a mandatory legal order signed by the CDC's Acting Director requiring her to remain at the facility through the end of the month [16].

"I feel betrayed," Perryman said. She had minimal contact with infected passengers, shows no symptoms, and wants to continue monitoring her health from her Florida residence rather than a federal facility in Nebraska [16].

The quarantine orders — issued to two of the 18 passengers, according to the CDC — represent the first mandatory federal quarantine orders since the beginning of the COVID-19 pandemic and only the second such use in approximately 50 years [6][16].

Lawrence Gostin, a public health law professor at Georgetown University, told NPR the legal case for the CDC is "very strong" given the virus's lethality [16]. But he also questioned whether the orders reflected "performative politics," noting that the risk of asymptomatic transmission is "exceedingly low" [16].

Hodge was more direct: without stronger evidence of actual risk or non-compliance potential, "there's a very real legal case" that the mandatory orders constitute a due process violation [15]. Home quarantine with monitoring, he suggested, might represent a less restrictive alternative that courts would require the government to consider [15].

The Case Against Quarantining Asymptomatic People

The scientific argument against mandatory quarantine of asymptomatic hantavirus-exposed individuals rests on a fundamental epidemiological fact: hantaviruses, including the Andes strain, are primarily transmitted through inhalation of aerosolized rodent excreta — dried urine, droppings, and nesting material [12]. Human-to-human transmission of the Andes strain, while documented, remains rare and appears to require close contact during the symptomatic phase [4][5].

The CDC itself acknowledged in a May 13 briefing that "current very limited evidence does not support a significant role for asymptomatic individuals in hantavirus transmission" [17]. The agency's own guidance supports active symptom monitoring of exposed individuals — not necessarily institutional quarantine [17].

Critics argue that if asymptomatic individuals are not infectious, confining them in a federal facility serves no epidemiological purpose that home monitoring with daily check-ins could not achieve. The quarantine, in this view, is a precaution calibrated to the virus's terrifying mortality rate rather than its actual transmission dynamics.

Defenders of the quarantine counter that the Andes strain's capacity for human-to-human transmission, even if rare, places it in a different category from other hantaviruses [4]. CDC officials have also pointed to practical concerns: private homes lack negative air pressure rooms, and guaranteeing 100% adherence to home quarantine is impossible [17]. The facility in Nebraska provides immediate access to the biocontainment unit and ECMO equipment that would be critical if a patient deteriorated rapidly [10].

Nebraska Hospitality — and Whether Comfort Matters

The quarantined Americans have not been left to languish. Nebraska Governor Jim Pillen arranged a pork tenderloin dinner. Local food trucks have delivered meals. Staff have organized lessons on the sandhill crane migration [2][18]. The rooms, while clinical in their air handling, resemble hotel rooms with workout machines and personal refrigerators [2][10].

This is not incidental. Public health research consistently shows that quarantine compliance improves when authorities address the physical and psychological needs of those confined. A systematic review published in BMC Public Health found that people who understood the rationale for quarantine and received adequate supplies, food, and clear information were more than twice as likely to comply fully [19]. Economic support — covering lost wages and providing essentials — was identified as a key factor in reducing non-compliance [19].

The Nebraska approach reflects these findings. By making the quarantine tolerable, officials reduce the incentive for passengers to contest their detention or attempt to leave. Whether this creates a "perverse incentive" — making quarantine attractive enough that future exposed travelers might welcome it — is largely theoretical. The passengers did not choose to be exposed to a virus with a 35% fatality rate, and the quarantine facility is not a resort. The calculus of a comfortable quarantine improving public health compliance has stronger empirical support than the concern that it encourages reckless behavior [19].

Cost and Liability

The National Quarantine Unit is federally funded, built with the $19.8 million ASPR grant, and the costs of housing and monitoring the passengers are borne by the federal government [10]. Specific per-person daily expenditure figures have not been publicly disclosed by the CDC or UNMC. The total projected cost for a 42-day quarantine of 18 individuals — including medical monitoring, meals, security, and staffing — has not been officially reported, though the specialized nature of the facility and 24/7 clinical oversight suggest a significant public expenditure.

As for the ship operator, Oceanwide Expeditions faces potential but uncertain legal exposure. The company's terms and conditions include liability waivers and require any lawsuits to be filed in the District Court of Middelburg in the Netherlands [20]. Under Dutch and European consumer protection law, courts can reject overly broad waiver provisions, but passengers would need to demonstrate gross negligence — that the company knew of a danger and failed to act [20]. No lawsuits have been publicly filed as of May 22 [20].

What Happens Next

The 42-day quarantine clock started on May 11, which means the full monitoring period extends to approximately June 22. The CDC has indicated some passengers may be released earlier — potentially at the 21-day mark on May 31 — pending updated guidance [7][16]. As of May 22, Nebraska officials were awaiting that guidance [7].

The two passengers under mandatory orders have the right to request a federal administrative hearing to contest their detention, though the practical timeline of such proceedings — against a quarantine that may end in weeks — limits the remedy's usefulness [15][16].

The broader questions raised by this episode extend well beyond 18 people in Omaha. The United States has one quarantine facility with 20 beds. Its legal framework for compulsory quarantine depends on a disease list that has not been updated in over a decade. And its first significant use of federal quarantine power since COVID-19 rests on a classification — hantavirus as SARS — that even sympathetic legal scholars call a stretch. Whether the nation's quarantine infrastructure and legal authorities are adequate for a world of emerging infectious diseases is a question the MV Hondius outbreak has put squarely on the table.