Another 41 people cruising off the coast of Japan have tested positive for the new coronavirus, bringing the total number of cases on board to 61.
About 3,700 people are aboard the Diamond Princess, which has been in quarantine in Yokohama for at least two weeks.
Checks began after an 80-year-old Hong Kong man who had been on the ship last month fell ill with the virus.
He boarded the luxury cruise in Yokohama on January 20 and landed in Hong Kong on January 25.
A separate cruise ship, the World Dream, was quarantined in Hong Kong after eight former passengers captured the virus. It has around 3,600 people on board, but so far none have tested positive.
Another ship, the Royal Caribbean Anthem of the Seas, is docked in the city of Bayonne in the US state of New Jersey. U.S. media images showed that medical professionals carry some passengers out of the boat on stretchers.
Bayonne Mayor Jimmy Davis said in a statement that about two dozen passengers were examined on Friday morning and four were taken to hospital for further testing.
“I have been informed that the CDC [Centers for Disease Control and Prevention] considers it a” low risk “situation. All other passengers released without the need for intervention.”
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Royal Caribbean also claimed to “participate in high levels of guest detection to control the spread of coronavirus” and to “closely monitor developments … and to have rigorous medical protocols aboard our ships.”
And an American-British owned liner, Westerdam, was rejected by Japan even though it reported no virus cases.