The World Health Organisation (WHO) has confirmed cases linked to the hantavirus-hit cruise ship have risen
Global health officials have said the number of hantavirus cases linked to a cruise ship have risen, with more cases ‘possible’.
The head of the World Health Organisation (WHO) said on Thursday (May 7) there are now five confirmed cases of hantavirus in the outbreak linked to the Dutch-flagged cruise ship, MV Hondius – up from two confirmed cases on May 4.
A total of eight cases of the virus have been reported, with five cases confirmed and three suspected, Tedros Ghebreyesus told reporters.
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He added that it is ‘possible’ that more cases may be confirmed due to the long incubation period of the virus, which can be ‘up to six weeks’.
He said: “WHO is aware of reports of other people with symptoms who may have had contact with one of the passengers. In each case, we are in close contact with the relevant authorities.
“Given the incubation period of the Andes virus, which can be up to six weeks, it’s possible that more cases may be reported.”
The strain involved in the outbreak is called the Andes virus – the only known hantavirus strain capable of spreading between humans. It is most likely to be transmitted between household members, intimate partners and people providing medical care, Dr Ghebreyesus said.
Three passengers have died amid the outbreak, while four others have been medically evacuated from the ship for treatment. Two British passengers who were medically evacuated from the ship are improving, global health officials have said.
Dr Maria Van Kerkhove, director of the department of epidemic and pandemic threat management at the WHO said two patients, including one Brit, remain in hospital in the Netherlands, while a British passenger is in intensive care in South Africa.
She told a WHO press briefing: “And I am very happy to say the patient in South Africa is doing better, and the two patients in the Netherlands we hear are stable. So that is actually very good news.”
Is hantavirus the ‘new Covid pandemic’?
The WHO said in a previous update that there was growing evidence of limited human-to-human transmission among close contacts on board MV Hondius, which is rare for hantaviruses.
Hantaviruses are usually spread by rodents, particularly rats. People can become infected with direct contact with rodent urine, saliva or droppings.
But unlike more contagious viruses like Covid-19 and flu, which spread more easily, hantavirus is rarely infectious
In an update on Thursday, Dr Van Kerkhove stressed it was not the start of a pandemic, saying: “This is not coronavirus. This is a very different virus. We know this virus, hantaviruses have been around for quite a while…But I want to be unequivocal here – this is not SARS-CoV-2; this is not the start of a Covid pandemic.”
The WHO’s Abdirahman Sheikh Mahamud described the outbreak is ‘a cluster in a confined space with close contact’.
He said: “We don’t anticipate a large epidemic with experience our member states have and the actions they have taken. We believe that this will not lead to subsequent chain of transmission.”
While experts stress the infection is ‘serious’, the virus is typically only spread with close and sustained contact.
As Prof Ellen Brooks Pollock, Professor in Infectious Disease Modelling, University of Bristol, explained: “Clusters of Hantavirus usually involve a limited number of people, but as we’ve seen, infection is serious.
“Where person-to-person transmission has been documented, it is usually with sustained and close contact, so the risk to the general population is low.
“However, symptoms can take weeks to appear, so it’s important that the individuals that have returned to the UK refrain from close contact with others for a period of weeks.”

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