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Hantavirus Cruise Outbreak: Focus Shifts to Intensive Care for HPS/HCPS

As the MV Hondius Andes outbreak progresses, medical teams onboard and ashore are emphasizing supportive care protocols, including ECMO, to manage the severe respiratory and hemodynamic challenges posed by Hantavirus Pulmonary Syndrome (HPS) and Hantavirus Cardiopulmonary Syndrome (HCPS). Mortality drivers remain a critical concern.

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Hantavirus Cruise Desk

Outbreak Tracking Team · May 10, 2026 · 5 min read

Hantavirus Cruise Outbreak: Focus Shifts to Intensive Care for HPS/HCPS

Clinical Management of Hantavirus Pulmonary Syndrome Onboard and Ashore

The ongoing hantavirus outbreak stemming from the MV Hondius Andes, currently anchored off Praia, Cape Verde, has brought the complexities of Hantavirus Pulmonary Syndrome (HPS), known in the Americas as Hantavirus Cardiopulmonary Syndrome (HCPS), into sharp focus. With reports of confirmed cases among passengers and crew, the primary strategy for managing severe infections remains aggressive supportive care, aiming to mitigate the rapid and often life-threatening deterioration of respiratory and cardiac function. HPS/HCPS is characterized by a prodromal febrile illness followed by the sudden onset of non-cardiogenic pulmonary edema, hypoxemia, and in many cases, myocardial dysfunction and hemodynamic instability. There is no specific antiviral treatment for hantavirus infections. As a result, clinical management centers on maintaining vital organ function while the patient's immune system combats the virus.

Supportive Care: The Cornerstone of Treatment

For moderate to severe cases, supportive care is paramount. This includes oxygen supplementation, aggressive fluid management to balance myocardial function and pulmonary congestion, and, critically, mechanical ventilation for patients developing acute respiratory distress syndrome (ARDS). Medical teams are reportedly adhering to established protocols for ARDS management, which include lung-protective ventilation strategies to prevent further injury to already compromised lungs. Given the rapid progression seen in severe HPS/HCPS, often within hours, early recognition and transfer to an intensive care setting are crucial. Onboard the MV Hondius Andes, resources for intensive care are limited, prompting discussions and logistical planning for potential medical evacuations to land-based facilities with advanced capabilities, should the clinical need arise. Cape Verdean health authorities, in conjunction with international organisations, are key players in coordinating these efforts.

ECMO Availability and Application

Extracorporeal Membrane Oxygenation (ECMO) has been identified as a potentially life-saving intervention for patients with severe HPS/HCPS who fail to respond to conventional mechanical ventilation. ECMO provides temporary cardiac and/or respiratory support by oxygenating the patient's blood outside the body, allowing the lungs and heart to rest and recover. But, ECMO is a highly specialized procedure requiring dedicated equipment, trained personnel, and sustained resources, which are typically found only in tertiary care centers. The availability and logistical feasibility of deploying ECMO for patients from the MV Hondius Andes present bigly challenges. Transportation of critically ill patients on ECMO is complex and requires careful planning and specialized medical teams. International health organizations, including the World Health Organization (WHO) and the European Centre for Disease Prevention and Control (ECDC), provide guidance on managing such complex medical emergencies in resource-constrained environments or during humanitarian crises. The US Centers for Disease Control and Prevention (US CDC) also offers extensive guidelines on HPS/HCPS management, including the consideration of ECMO.

Identifying Mortality Drivers

Mortality in HPS/HCPS can be substantial, with rates varying bigly depending on the hantavirus strain and the quality of supportive care. The main drivers of mortality are progressive hypoxemia due to pulmonary edema, cardiogenic shock secondary to myocardial depression, and profound hemodynamic instability. By contrast, the rapid onset and progression of these symptoms often overwhelm the body's compensatory mechanisms. Early recognition of warning signs, such as increasing respiratory rate, decreasing oxygen saturation, and signs of shock, is critical for timely intervention. Aggressive monitoring of vital signs, fluid status, and cardiac function allows clinicians to anticipate and manage complications. The specific hantavirus strain implicated in the MV Hondius Andes outbreak has not yet been definitively confirmed, which could influence prognoses and clinical trajectories, as virulence varies among strains. Public health authorities are awaiting further epidemiological and virological data. Medical teams are working round the clock to ensure the best possible care under challenging circumstances, coordinating closely with international experts to refine clinical protocols and manage patient flow should further severe cases emerge.