An outbreak of hantavirus on board a cruise ship is not the start of a pandemic, the UN health agency has said.
Maria van Kerkhove, an infectious disease epidemiologist at the World Health Organization (WHO), told a news briefing that it was not the same situation as six years ago with Covid-19, because hantavirus spreads through “close, intimate contact”.
Health authorities are racing to trace dozens of people who have recently disembarked from the Dutch vessel MV Hondius.
On Thursday, the WHO said that overall, five of eight suspected cases of hantavirus had been confirmed. Three people have died, including a 69-year-old Dutch woman, who had the virus.
Her Dutch husband and a German woman also died, and their cases are being investigated.
Hantavirus typically spreads from rodents – but in the latest outbreak the transmission between people was documented for the first time, the WHO said.
The luxury cruise, operated by Oceanwide Expeditions, began its journey on 1 April in Ushuaia, Argentina, and is expected to arrive in Spain’s Canary Islands on 10 May.
About 150 passengers and crew from 28 countries are reported to have initially been aboard the vessel, but dozens disembarked on the island of St Helena on 24 April.
At Thursday’s news briefing, van Kerkhove said “this is not Covid, this is not influenza, it spreads very, very differently”.
She said authorities had asked “everyone to wear a mask” on board the MV Hondius.
Those in contact with or caring for suspected cases, she added, should “wear a higher level of personal protective equipment”.
At the same briefing, WHO Director General Tedros Ghebreyesus said his organisation “assesses the public health risk as low”.
He said the first two people with the confirmed virus had “travelled through Argentina, Chile and Uruguay on a bird-watching trip which included visits to sites where the species of rat known to carry the virus was present”.
Dr Tedros said the WHO was aware of reports of other people with symptoms who may have had contact with passengers, adding that officials were in touch with the relevant authorities.
Given the incubation period of this disease – which can be up to six weeks – it was possible more cases may be reported, he said.