The WHO scrambled to reassure the world that the outbreak was not a repeat of the Covid pandemic, stressing that the contagion was very rare.
The ship docked in Rotterdam harbour in the Netherlands last week, with the skeleton crew facing weeks of quarantine.
Everyone still on board is asymptomatic, according to Oceanwide Expeditions, and being closely monitored by two medics.
Hantavirus has been confirmed in seven patients, with one other probable case, according to an AFP tally from official sources.
The virus typically spreads from the urine, faeces and saliva of infected rodents and is endemic in Argentina, where the voyage began.
Those infected have the Andes strain – the only strain of hantavirus that can spread between people.
The ship set off April 1 from Ushuaia, Argentina, taking in remote islands in the South Atlantic Ocean before steaming north to Cape Verde, then Spain’s Canary Islands.
Officials in Argentina’s Tierra del Fuego province have downplayed the likelihood that the first victim in the outbreak became infected in Ushuaia.
The province has not had a case of hantavirus since its reporting became mandatory 30 years ago.
The Andes strain is however present in other Argentine provinces more than 1000km away in the north.
- AFP