Expedition cruises, island hopping, and zoonotic risk: governance and operational lessons from the MV Hondius Andes hantavirus outbreak - Summary - MDSpire

Expedition cruises, island hopping, and zoonotic risk: governance and operational lessons from the MV Hondius Andes hantavirus outbreak

  • By

  • Esteban Ortiz-Prado

  • María Paz Cadena

  • María A. Vethencourt-Ysea

  • Jorge Vasconez-Gonzalez

  • Kirk O. Douglas

  • Juan S. Izquierdo-Condoy

  • July 16, 2026

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Objective:

To analyze the Andes orthohantavirus outbreak linked to the MV Hondius expedition cruise and identify governance and operational gaps in outbreak preparedness for expedition travel.

Approach:
  • Case Study Analysis: Utilized the MV Hondius outbreak as a case study to assess the intersection of zoonotic exposure and public health challenges in expedition cruises.
  • Evaluation of Existing Guidelines: Reviewed International Health Regulations, WHO ship-event guidance, and ECDC recommendations to identify gaps in their application to expedition-specific contexts.
Key Findings:
  • The outbreak involved 13 reported cases and three deaths, with a case fatality ratio of 25%.
  • Limited person-to-person transmission of Andes virus was documented, which is atypical for orthohantaviruses.
  • Critical vulnerabilities were identified, including the absence of binding protocols for medical evacuation and a lack of standardized passenger traceability systems.
Interpretation:

The MV Hondius outbreak illustrates the complexities of managing zoonotic diseases in the context of expedition travel.

Limitations:
  • The analysis is based on a single outbreak case study, which may limit generalizability.
  • Existing guidelines may not be fully operationalized in remote expedition contexts.
Conclusion:

The outbreak underscores the importance of establishing enforceable preparedness arrangements for expedition cruises.

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