Ten more people on a quarantined cruise liner in Japan have tested positive for coronavirus, officials said on Thursday, as health experts stepped up efforts to find a vaccine for a disease that has provoked fears of a global pandemic.
The death toll from the virus in mainland China jumped by 73 to 563, with more than 28,000 confirmed infections there.
The virus has shut down cities and factories in China and disrupted global air travel. This week, it brought chaos to the sedate world of luxury ocean cruises.
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