Hantavirus outbreak linked to cruise ship triggers global health alert

Health authorities are working to contain a potential international spread of hantavirus after new suspected cases emerged across multiple countries, raising concerns about transmission linked to a cruise ship outbreak.

The World Health Organization (WHO) confirmed that the initial cluster of infections originated aboard the Dutch-flagged cruise ship MV Hondius, where eight passengers were reported ill. Three of them have died, while six cases have now been confirmed as hantavirus infections. The outbreak is believed to involve the Andes strain of the virus, which is rare and can, in limited circumstances, spread between humans through prolonged close contact.

On Friday, officials reported additional suspected cases far from the ship’s route. One case involved a man who fell ill after disembarking in Spain, while another involved a woman who developed symptoms after sitting near an infected passenger on a commercial flight. Health authorities also flagged a suspected case on the remote South Atlantic island of Tristan da Cunha, one of the most isolated inhabited places on Earth.

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The ship, which had travelled from Argentina through Antarctic waters before heading toward the Canary Islands, carried 147 passengers and crew. Several travellers had already disembarked before the outbreak was confirmed, prompting international contact tracing and quarantine measures in multiple countries.

The US Centers for Disease Control and Prevention has arranged medical evacuation and quarantine procedures for returning passengers, while health agencies in Europe and Africa are monitoring exposed individuals.

Despite the widening geographic spread of suspected cases, WHO officials stressed that the overall risk to the general public remains low. The virus is primarily transmitted through rodents, and sustained human-to-human transmission is considered rare.

Experts say the incident highlights how infectious diseases can spread rapidly across continents through modern travel networks, even when the likelihood of large-scale outbreaks remains limited.