Two elderly former passengers from the coronavirus-wracked Diamond Princess died Thursday, Japanese authorities said, as fears mount for those who have left the ship after testing negative for the virus.
The man and woman, both Japanese and in their 80s, were taken off the cruise ship last week and died in hospital, the first fatalities among the more than 600 passengers and crew who have tested positive for the virus.
The man had a pre-existing condition of bronchial asthma and a history of angina treatment, the health ministry said in a statement, but the woman had no known pre-existing conditions.
The direct cause of her death was pneumonia.
"I pray for their souls and offer condolences to their bereaved families," Health Minister Katsunobu Kato told MPs.
"The two were sent to medical facilities when they showed symptoms. I believe that they received the best possible treatment," he said.
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The huge vessel moored in Yokohama near Tokyo is easily the biggest coronavirus cluster outside the Chinese epicentre, with 621 positive cases confirmed among the passengers and crew.
On Wednesday, 443 passengers disembarked after testing negative for the COVID-19 virus and not showing symptoms during a 14-day quarantine period.
The removal of all passengers was expected to take at least three days.
More passengers left the ship Thursday, packing into yellow buses and leaving for stations and airports to head home.
But questions are increasingly being asked as to why former Diamond Princess passengers are able to roam freely around Japan's famously crowded cities, even if they have tested negative.
"Is it really safe to get off?" screamed a headline in the Nikkan Sports tabloid.
The paper quoted one passenger who said he was tested on February 15, but only left four days later.
"I thought I could be infected during the four days. I thought 'Is it really OK'?"
The government also released a document from the National Institute of Infectious Diseases (NIID), which pointed to "clear evidence that substantial transmission of COVID-19 had been occurring prior to implementation of quarantine on Diamond Princess."
"Due to the nature of the ship, individual isolation of all those aboard was not possible. Sharing of cabins was necessary, and some crew had to continue to perform essential duties for the functioning of the vessel."