The United Kingdom confirmed two British hantavirus cases linked to an outbreak on board the MV Hondius and was assessing a suspected infection on Tristan da Cunha, the UK Health Security Agency said Friday.
Officials did not release further details about the suspected case on the remote South Atlantic island.
Three people, a Dutch couple and a German national, died after contracting the virus during the voyage. Five infections had been confirmed, and several additional suspected cases were under investigation.
The vessel is due to dock in Tenerife in the coming days. British passengers who remain asymptomatic will be flown back to the United Kingdom and asked to isolate for 45 days as a precaution.
Seven British nationals disembarked earlier in St. Helena, a British overseas territory in the South Atlantic. Authorities said two were already isolating in mainland Britain, four remained on the island, and one had been traced outside the country.
Passengers from at least 12 countries who left the ship earlier in April were contacted as part of tracing efforts. Monitoring was under way in multiple regions, including the United States and Singapore, where returning travelers were being tracked or tested despite showing no symptoms.
The Centers for Disease Control and Prevention said it was closely monitoring developments and assessed the risk to the U.S. public as extremely low. Health departments in Georgia and Arizona were monitoring returning residents without symptoms, and other states, including California and Texas, had also identified passengers linked to the voyage.
Singapore isolated and was testing two residents who had been on board, while a French contact was also identified without symptoms.
“This is not coronavirus, this is a very different virus,” said Maria Van Kerkhove, WHO director of epidemic and pandemic management. “This is not the same situation we were in six years ago.”
President Donald Trump said he had been briefed on the outbreak and expressed confidence it was being contained.
“It’s very much, we hope, under control,” Trump said. Asked if people in the U.S. should be concerned about possible spread, he replied: “I hope not.”
Hantavirus is typically transmitted through contact with infected rodents, though rare cases of person-to-person transmission have been recorded. Health agencies said the outbreak remained contained, with no evidence of broader transmission beyond those directly connected to the cruise.