Health authorities are tracing and isolating passengers from the MV Hondius after a hantavirus outbreak linked to the cruise ship left three passengers dead and renewed public anxiety over infectious disease threats.
The concern is real for people who were on the ship or had close contact with passengers, but officials have so far drawn a clear line between this outbreak and a pandemic-style respiratory virus. The World Health Organization says there is no sign of a larger outbreak, while cautioning that the situation could change as monitoring continues.
Dr Maria Van Kerkhove of the WHO put the distinction bluntly: “This is not Covid, this is not influenza, it spreads very, very differently.”
Why the risk is considered low
The outbreak involves the Andes strain of hantavirus. Unlike measles or flu, it is not considered highly contagious. Human-to-human spread can happen, but health experts say it generally requires prolonged close physical contact, not ordinary public encounters in shops, schools, workplaces or open spaces.
Hantavirus more commonly spreads from rodents. People can be infected by breathing air contaminated with virus particles from rodent urine, droppings or saliva. It remains unclear how the MV Hondius outbreak began. The cruise had visited remote wildlife areas, raising the possibility that someone was exposed there, though exposure before boarding has not been ruled out.
Officials and experts have also said some transmission may have occurred aboard the ship, where passengers shared cabins, dining areas and other close quarters. That is why the public-health response has focused on passengers, crew and close contacts rather than the general population.
What is known about the cases
Three passengers have died after travelling on the ship; two were confirmed to have had the virus, according to the BBC’s account of official information. Nine test-confirmed cases have been identified.
Passengers from the MV Hondius have been evacuated and sent to their home countries to isolate and receive medical care if needed. Some passengers left earlier on flights or other travel connections, and their contacts are being traced as a precaution.
The response has already spread across several countries. Twenty Britons are isolating at Arrowe Park Hospital in Merseyside after a chartered flight from Tenerife landed at Manchester Airport, with plans for 72 hours of hospital isolation followed by 42 days at home. UK Health Security Agency chief scientific officer Prof Robin May told the BBC the British evacuees were healthy and asymptomatic, while also saying the isolation period could be updated as the science develops.
Other countries have reported patients or possible cases connected to the ship. A French passenger showed symptoms while being repatriated and was isolating in Paris. Two British nationals with confirmed cases were being treated in the Netherlands and South Africa. Spain said one evacuated passenger quarantining in Madrid had provisionally tested positive. U.S. officials said one American passenger had mild symptoms and another had tested mildly positive for the Andes strain, with both travelling in biocontainment units as a precaution.
Why isolation lasts so long
Symptoms usually appear two to four weeks after exposure, but they can emerge more than a month later. That long incubation window explains why passengers and contacts face extended monitoring or self-isolation even when they feel well.
Illness from the Andes strain can begin with flu-like symptoms, including fever, fatigue and muscle aches. Some patients may develop shortness of breath, stomach pain, nausea, vomiting or diarrhoea. Tests can diagnose the infection, but there is no specific treatment; medical care focuses on supporting the patient and treating symptoms. Early hospital support can improve survival.
The central public message from health agencies is that people not linked to the cruise face very low risk. For those who were aboard the MV Hondius, travelled with passengers or had close contact with them, the next pressure point is continued tracing, testing and isolation through the period when symptoms could still develop.
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