Hantavirus outbreak on Netherlands-based cruise ship

A suspected hantavirus outbreak struck the Netherlands-based cruise ship MV Hondius, operated by Oceanwide Expeditions, killing three passengers and sickening others in the Atlantic Ocean. The vessel, carrying about 150 passengers and crew, departed Argentina three weeks prior, touring Antarctica before heading to Cape Verde off Africa’s west coast.

Reports emerged on May 3, 2026, confirming three deaths: two Dutch nationals – a 70-year-old man and 69-year-old woman, a couple – and a third unidentified passenger. Three others fell ill, including two symptomatic crew members still aboard and a British passenger in intensive care in Johannesburg, South Africa. Lab tests verified hantavirus in one case, with five suspected, per the World Health Organization (WHO).

Hantavirus, rodent-borne, spreads via urine, droppings, or saliva inhalation, causing hantavirus pulmonary syndrome (HPS) – fever, muscle aches escalating to severe respiratory failure with 38% mortality. No person-to-person transmission occurs; likely origin was rodent infestation from Antarctic ports or ship stores. Symptoms mimic flu initially, turning fatal rapidly without ventilators or ECMO.

Oceanwide halted disembarkation near Cape Verde, where authorities boarded for assessments. Dutch officials approved repatriating symptomatic crew and one body to the Netherlands; WHO coordinates evacuations. The ship remains anchored, prioritizing medical care amid isolation protocols – no new ports granted.

WHO conducts risk assessments, aiding member states in passenger support. South Africa’s Health Department treats the British patient; UK Foreign Office assists nationals. Netherlands Foreign Ministry confirmed Dutch fatalities without details. No broader travel alerts issued yet, as cases containable.

The remaining ~140 passengers face quarantine-like conditions, anxiety over rodent checks, and itinerary disruptions – original Cape Verde endpoint cancelled. Families grieve; media notes prior cruise outbreaks (e.g., norovirus), but hantavirus rare at sea.

This marks a rare maritime hantavirus cluster, spotlighting expedition risks in rodent-prone Antarctica. Operators may enhance pest controls; WHO urges vigilance globally, though public risk low outside ship. Investigations pinpoint source – likely rats from provisioning – to prevent recurrence.

Cruise lines should seal food, trap rodents pre-voyage, educate on avoidance. Public: Wear masks in dusty areas, disinfect exposures. Outbreak underscores polar travel hazards amid climate-driven rodent shifts.