Three people have died after a suspected hantavirus outbreak involving a cruise vessel sailing in the Atlantic Ocean, according to the World Health Organization.
One case of hantavirus infection has been laboratory-confirmed, while five further cases are being investigated. A 69-year-old British national is reported to be in intensive care in South Africa.
Health authorities have not yet confirmed that hantavirus caused all three deaths, and further testing is ongoing.
Background
The vessel has been identified in reports as the MV Hondius, an expedition cruise ship operated by Oceanwide Expeditions.
The company’s own ship information describes Hondius as a Polar Class 6 expedition vessel with capacity for 170 passengers, 57 crew, 13 guides and one doctor.
The ship was reported to have been travelling from Argentina towards Cape Verde, with South African health officials saying the voyage included Antarctic and Atlantic stops before heading across the ocean. The vessel was later reported to be docked at Praia, the capital of Cape Verde.
Hantaviruses are a family of viruses that can cause serious illness. The US Centers for Disease Control and Prevention says they are mainly spread by rodents and can infect people exposed to rodent urine, droppings or saliva.
The CDC says hantaviruses are not generally spread from person to person, although WHO has said rare person-to-person spread may occur depending on the circumstances and virus type.
Current Developments
WHO says one case of hantavirus infection has been laboratory-confirmed. Five additional cases are suspected. Of the six affected people, three have died and one is in intensive care in South Africa.
WHO says detailed investigations are continuing, including further laboratory testing, epidemiological work and sequencing of the virus. Medical care and support are being provided to passengers and crew.
WHO also says it is helping co-ordinate between member states and the ship’s operators for the medical evacuation of two symptomatic passengers, alongside a public-health risk assessment for those remaining on board.
South Africa’s Department of Health has identified the ship as MV Hondius. Reuters reported that WHO itself did not name the vessel in its statement, but a source familiar with the situation identified it as MV Hondius.
South African authorities said the first known victim was a 70-year-old man who died on the ship, with his body removed in Saint Helena. His 69-year-old wife later died in a Johannesburg hospital after also becoming ill.
The UK Foreign Office has said it is monitoring reports of a potential hantavirus outbreak on Hondius and is in contact with the cruise company and local authorities. A British national is reported to be in intensive care in Johannesburg.
Analysis And Implications
The most important caution is that this remains a suspected outbreak, not a fully concluded investigation.
Only one hantavirus infection has been confirmed so far. The other cases are still described as suspected, and the deaths have not all been formally attributed to hantavirus by the publicly available official information.
For that reason, it would be inaccurate to state that “hantavirus killed three passengers” unless that is later confirmed by health authorities.
The incident also raises practical questions for cruise operators, port authorities and public-health agencies. WHO is already involved in medical evacuation planning, risk assessment and support for passengers and crew.
South Africa’s National Institute for Communicable Diseases is also reported to be carrying out contact tracing in the Johannesburg region after sick passengers were transferred there.
For travellers, the story should be treated seriously but not sensationally. Hantavirus can cause severe illness, including serious respiratory disease, but it is usually associated with environmental exposure to infected rodents rather than the kind of common person-to-person spread seen with illnesses such as influenza or norovirus.
The CDC says there is no specific treatment for hantavirus infection, with care focused on supportive treatment, including breathing support or dialysis in severe cases.
At this stage, there is no public finding that the cruise operator, crew or any port authority was at fault. Any suggestion of negligence, contamination or unsafe conditions would need to be backed by official findings or evidence.
What Happens Next
Health authorities are expected to continue laboratory testing, sequencing and epidemiological investigations to confirm the source, virus type and full chain of exposure.
Further updates may come from WHO, South African health authorities, Cape Verde authorities, the Saint Helena Government, the UK Foreign Office, the Dutch Foreign Ministry and Oceanwide Expeditions.
The key points to watch are whether additional suspected cases are confirmed as hantavirus, whether health authorities confirm the cause of all three deaths, whether the source of exposure is identified, whether passengers or crew remaining on board require further medical evacuation and whether any travel, port or cruise-operation guidance is issued.
Until those details are confirmed, the safest public wording remains: three people have died amid a suspected hantavirus outbreak on an Atlantic cruise vessel, with one case confirmed and further investigations under way.
Source List
Reuters: Three passengers dead, one case of hantavirus confirmed from Atlantic cruise ship, WHO says
https://www.reuters.com/business/healthcare-pharmaceuticals/three-passengers-dead-one-case-hantavirus-confirmed-atlantic-cruise-ship-who-2026-05-03/
Associated Press: A suspected hantavirus outbreak on a cruise ship in the Atlantic Ocean kills 3 people, WHO says
https://apnews.com/article/4c9215a2bd7cd34a743b2a31323c7e18
Sky News: Three dead as virus breaks out on Atlantic cruise ship, UK tourist in intensive care
https://news.sky.com/story/three-dead-as-virus-breaks-out-on-atlantic-cruise-ship-13503266
The Independent: Three dead and British national in intensive care after virus outbreak on Atlantic cruise ship
https://www.independent.co.uk/travel/news-and-advice/cruise-ship-deaths-virus-atlantic-ocean-mv-hondius-b2969838.html
Oceanwide Expeditions: MV Hondius vessel information
https://oceanwide-expeditions.com/our-fleet/m-v-hondius
CDC: About Hantavirus
https://www.cdc.gov/hantavirus/about/index.html
