Three fatalities have been recorded and dozens of nations have activated public health protocols following a hantavirus outbreak linked to the expedition cruise vessel MV Hondius, prompting the World Health Organization (WHO) to warn of additional confirmed cases in the coming days. The incident, which has drawn unwelcome comparisons to the uncoordinated early spread of the COVID-19 pandemic, unfolded after passengers disembarked the ship before health officials detected the outbreak, allowing potentially exposed travelers to disperse across the globe.
As of May 7, 2026, three people – a Dutch couple and one German national – have died from the virus, after the ship embarked on its voyage from Argentina last month. On Thursday, the WHO officially confirmed five active hantavirus cases, with a formal advisory forecasting more diagnoses as contact tracing efforts expand. In a balancing move to avoid widespread public panic, global health leaders have stressed that the current risk profile differs sharply from the COVID-19 pandemic.
The WHO emphasized that there is currently no evidence of sustained, human-to-human widespread transmission, and the agency does not expect the outbreak to escalate into a large-scale global epidemic. “We are working with relevant countries to support international contact tracing, to ensure that those potentially exposed are monitored and that any further disease spread is limited,” a WHO spokesperson said in a statement.
Genetic sequencing has linked the outbreak to the Andes strain of hantavirus, a pathogen that is far less transmissible between people than SARS-CoV-2, the virus that causes COVID-19. Investigators currently believe the initial infections did not originate on the cruise ship itself. Instead, they trace the first exposure to an off-vessel bird-watching excursion that took passengers through wetlands and natural areas across Argentina, Chile, and Uruguay – regions home to rodent populations known to carry the Andes hantavirus strain.
At present, potentially exposed and monitored passengers are spread across 26 countries, with major concentrations found in the Netherlands, South Africa, Switzerland, the United Kingdom, the United States, and Singapore. Of the original passenger complement, 146 people remain on board the MV Hondius, which is scheduled to dock in Tenerife, Spain this Sunday. Once the vessel clears port health inspections, the remaining passengers will be repatriated to their home countries via chartered flights.