Suspected hantavirus cluster aboard MV Hondius off Cape Verde prompts WHO response
Three deaths and multiple illnesses tied to a suspected hantavirus cluster on the MV Hondius off Cape Verde; WHO says broader public risk is low. Officials say.
The World Health Organization has described a suspected hantavirus outbreak aboard the polar expedition ship MV Hondius, which is anchored off the coast of Cape Verde after three passengers died and three others fell ill. The term hantavirus appears in initial investigations and in public statements, and WHO teams are working with national authorities to assess and contain the incident. Oceanwide Expeditions, the Dutch operator of the vessel, confirmed a serious medical situation while the Dutch foreign ministry has acknowledged fatalities among its nationals. The agency reiterated that the wider risk to the general public remains low as authorities focus on medical care, testing and evacuation.
Suspected hantavirus cluster on polar expedition ship
The MV Hondius, a polar expedition vessel carrying around 150 people, is the site of the suspected cluster that prompted international health attention. According to reports, the ship departed Argentina roughly three weeks before the incident and called at Antarctic sites during its voyage. Local and international teams are treating and monitoring the sick on board, while crew members coordinate with port authorities in Cape Verde for possible disembarkation and medical evacuation. Initial case counts indicate three deaths and three confirmed illnesses among passengers or crew, though investigations are ongoing.
WHO describes low wider risk while supporting response
Hans Kluge, director for WHO’s European region, said the immediate public health risk beyond those exposed remains low and cautioned against panic or travel restrictions. WHO has mobilized technical support to help with clinical care, evacuation logistics and epidemiological investigations. The agency is assisting with risk assessment and coordinating with involved countries to ensure laboratory testing and follow-up for close contacts. Health officials emphasize that swift, coordinated action is aimed at preventing further spread and clarifying the outbreak’s source.
Operator and Dutch authorities confirm medical emergency
Oceanwide Expeditions said it is managing a “serious medical situation” and cooperating with local authorities and health agencies to support passengers and crew. The company confirmed that the MV Hondius is currently positioned off Cape Verde while response measures take place. The Dutch foreign ministry has publicly confirmed that two of the deceased were Dutch citizens, and it is engaged with consular teams to assist families and arrange repatriation where appropriate. Crew members and medical staff remain on site to stabilize patients and liaise with emergency services.
Ship itinerary raises questions about possible exposure routes
Investigators are reviewing the ship’s recent itinerary, which included departures from Argentina and stops in polar and remote sites, to identify where potential rodent exposure or other risk factors may have occurred. Hantaviruses are typically associated with rodent reservoirs, and investigators will examine storage areas, cargo holds and any possible rodent incursions that could have exposed passengers or crew. The vessel’s remote route complicates the timeline for symptom onset reporting and testing, prompting authorities to reconstruct movements and exposures since departure. Authorities will use this timeline alongside clinical and laboratory data to determine the most likely point of origin.
Transmission characteristics and public health guidance
Health agencies note that hantaviruses are primarily zoonotic infections transmitted from infected rodents to humans, often via inhalation of contaminated dust or contact with rodent excreta. Person-to-person transmission is rare and has been documented only for specific hantavirus strains in limited situations, so officials stress that typical community spread is unlikely. Symptoms can start with fever, fatigue and muscle aches and may progress in severe cases to respiratory distress or organ dysfunction, requiring urgent medical care. Authorities advise that anyone who traveled on the MV Hondius or had close contact with passengers report symptoms promptly and follow instructions from public health teams.
Ongoing investigations, testing and next steps for passengers
Laboratory testing is under way to confirm the presence and strain of hantavirus in clinical samples, and environmental testing on board the ship will look for evidence of rodent activity or contamination. WHO and national health authorities are coordinating contact tracing, monitoring exposed individuals, and arranging medical evacuation for those whose condition requires advanced care ashore. The operator and local governments are also discussing port entry, disembarkation procedures and safe handling of the vessel to prevent further exposure. Authorities have pledged to share results of investigations and to provide regular updates to affected families and the public.
The immediate focus remains patient care, testing and containment as teams work to establish cause and scope, and public health agencies continue to stress that the overall risk to the broader population is low. Passengers, crew and the families of those affected are receiving support from health and consular services while investigations proceed. Officials have urged calm, transparent communication and adherence to public health guidance as more information becomes available.
