Australia extends quarantine for cruise ship passengers after hantavirus outbreak

Australia tightened one of its most unusual border-health responses by extending the quarantine of six repatriated cruise passengers to 42 days, keeping them isolated at a facility near Perth until June 23. The longer confinement reflected fears about Andes hantavirus, which can have a long incubation period and can surface after travelers have already gone home.

Health Minister Mark Butler said the passengers had been informed of the decision and remained well. The group, four Australian citizens, one permanent resident and one New Zealand resident, had already been scheduled to stay in quarantine until June 5, but officials added another 18 days after advice from authorities. The passengers had flown from the Netherlands to Perth on May 15 and were taken first to RAAF Base Pearce before being bused to the Centre for National Resilience in Bullsbrook, an outer Perth suburb.

The facility itself has become part of Australia’s public-health toolkit. The 500-bed centre, about 40 to 43 kilometres north-east of Perth, was completed in 2022 during the COVID-19 response and had mostly been used for bushfire evacuees before this operation. Keeping the passengers there for six weeks underscored how seriously Australian officials treated the risk of any transmission into the broader community, even while they balanced that caution against the welfare of people already under confinement.

The outbreak linked to the Dutch-flagged luxury cruise ship MV Hondius was first notified to the World Health Organization on May 2. By May 13, the agency said there were 11 cases and three deaths. By May 26, the European Centre for Disease Prevention and Control said the total had risen to 13 cases, including 11 confirmed and two probable, with the risk to the EU/EEA general population still considered very low. Public-health investigators have worked on the assumption that the first infection was acquired before boarding, through land exposure, while contact tracing continued with authorities in Argentina and Chile.

The ship’s route and the human toll have made the episode unusually far-reaching. It had been sailing from Argentina to Antarctica and then toward isolated South Atlantic islands when the outbreak was identified. One Dutch passenger died on April 11, his wife died days later after disembarking, another passenger was medically evacuated to South Africa and remained hospitalized, and a German passenger died on May 2. The MV Hondius was heading back to the Netherlands for cleaning and disinfection, while Australia’s decision signaled a more aggressive quarantine posture than many countries would have taken for a small repatriated group.