How are countries responding to the hantavirus outbreak? Returning travellers asked to self-isolate
The UK, the US and EU member states have asked all citizens returning home from the virus-hit MV Hondius cruise ship to self-isolate for about six weeks. All three jurisdictions have framed the request as a precaution; they say the Andes strain of hantavirus only rarely passes between people, but want a controlled monitoring window.
The outbreak on the MV Hondius drew attention after three deaths and several confirmed cases. After the ship was diverted to the Canary Islands and three passengers were transferred to the Netherlands for treatment, public-health authorities from the three regions moved to align on a common protocol for returning passengers.
A spokesperson for the UK Health Security Agency told the BBC the isolation period reflected the disease's monitoring window: "Hantavirus has an incubation period typically of two to four weeks; a six-week follow-up provides a safety margin." Passengers are being asked to record daily temperature readings and contact health teams at the first sign of symptoms.
The US Centers for Disease Control and Prevention (CDC) issued a parallel six-week home-isolation recommendation. A CDC spokesperson said passengers had been screened on entry to the US, and three were transferred to federal biocontainment facilities; one of those tested "mildly positive," which the World Health Organization (WHO) has called "inconclusive" for now.
EU member states have made parallel moves with national implementation differences. France's prime minister announced that five French passengers returning from the MV Hondius would be quarantined in Paris "until further notice." Germany and Spain set out their own national protocols. Coordination through the European Centre for Disease Prevention and Control (ECDC) is under way.
The World Health Organization confirmed that the Andes strain had passed between two cases aboard the ship, calling the development "infrequent" but worth tracking. A WHO spokesperson emphasised that while documented human-to-human transmission of this strain remains rare, this event called for careful surveillance.
The Andes strain is a hantavirus found primarily in Patagonia, particularly Chile and Argentina. Its main reservoir is a rodent species, Oligoryzomys longicaudatus, often referred to as the long-tailed pygmy rice rat. Humans typically contract the virus through contact with rodent urine, droppings or saliva; rare human-to-human transmission has been recorded in earlier outbreaks.
Clinical presentation usually begins with fever, muscle aches and respiratory symptoms. Rapidly progressing cases can develop into hantavirus pulmonary syndrome. The CDC notes that historical case-fatality rates for the Andes strain sit around 35 to 40 percent; early supportive care substantially increases the chance of survival.
Countries have also tightened port inspections. Several Mediterranean and Atlantic coastal nations now require cruise operators to present updated pest-control records before vessels are cleared for service. The Cruise Lines International Association has asked its members to voluntarily commission additional inspections.
Experts have urged the public not to panic. Standard outbreak tools — contact tracing, isolation and surveillance — are considered sufficient to contain transmission. The international spread of MV Hondius passengers has made the response, in effect, a coordinated international test of these protocols.