Hantavirus outbreak on MV Hondius cruise ship prompts global health warnings

A hantavirus outbreak was confirmed on the Dutch cruise ship MV Hondius as it sailed from Argentina toward the Falkland Islands. The incident has led the World Health Organization to warn of a possible rise in cases because of the virus’s long incubation period and close contact among passengers.

Russian epidemiologist Genadiy Onishchenko noted that a vaccine could eventually be developed, but the process would take several years and must meet strict clinical trial standards. He stressed that more than 40 hantavirus strains exist, requiring careful selection of target strains for any future vaccine, and urged the public to follow preventive measures, avoid travel to endemic regions, and maintain vigilance.

Experts in the United States highlighted a mortality rate of up to 35 % for infected individuals, with most cases historically recorded in Colorado, Arizona and New Mexico. Over the past three decades the U.S. has logged 890 cases. A 2018 outbreak in Argentina infected 34 people, killing 11. Recent evacuations of the MV Hondius left a French national and a Greek citizen in quarantine in Athens.

No approved vaccine or specific antiviral treatment exists. Management is limited to supportive care such as oxygen, mechanical ventilation and, in severe cases, ECMO. Health authorities advise avoiding rodent‑infested areas, using protective equipment when cleaning, and staying informed about regional risks.