Hantavirus outbreak on cruise ship highlights uncertainty over human-to-human spread
Close to 150 passengers and crew members from the cruise ship MV Hondius have disembarked and are returning to their home countries to quarantine after an outbreak of deadly hantavirus. The response will vary by country, reflecting both local public-health rules and the fact that outbreaks are rare and the virus’s spread between people is not fully understood.
Hantavirus outbreak exposes uncertainty about how disease spreads.
Zdroj: https://www.nature.com/articles/d41586-026-01512-w
“It is kind of a real-time experiment happening in front of us,” says Vaithi Arumugaswami, a molecular virologist at the University of California, Los Angeles.
Passengers from Spain will spend one week in court-mandated quarantine at a military hospital, with the possibility of extension. Those returning to the United States will be assessed on arrival at the University of Nebraska Medical Center in Omaha and can then choose to quarantine there or at home for 42 days. Passengers returning to the United Kingdom will be monitored in hospital for 72 hours before 45 days of isolation at home or at a facility.
The European Centre for Disease Prevention and Control says all passengers are high-risk contacts and should self-isolate, monitor for symptoms daily and be tested if symptoms develop. The World Health Organization recommends 42 days of quarantine after exposure, based on the virus’s long incubation period. Rhys Parry, a molecular virologist at the University of Queensland in Brisbane, Australia, says symptoms can appear anywhere from 9 to 40 days after exposure.
More cases may emerge in the coming days. Arumugaswami says one French national developed symptoms during evacuation from the ship, and a US passenger travelling with other nationals on a non-commercial flight to the United States has also tested positive.
At least six people have tested positive for the Andes species of hantavirus in connection with the outbreak, and another two passengers are suspected of infection. Three infected people have died.
The WHO says the virus probably spread after one infected passenger, who had been in Argentina where there is an ongoing outbreak, boarded the ship. Hantaviruses usually spread through particles from rodent urine, droppings or saliva, but the Andes species can also spread between people in close contact. Even so, how efficiently it passes between people remains unclear.
Jennifer Angulo, a molecular virologist at the Pontifical Catholic University of Chile in Santiago, says epidemiological data suggest the risk from contact with an infected person remains relatively low. Transmission generally requires prolonged close contact, especially early in illness when symptoms are mild. The highest risk is among sexual partners and people sharing a bed or bedroom with an infected person.
Zdroj: Nature News
Pôvodný článok: https://www.nature.com/articles/d41586-026-01512-w


