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The death toll from China's coronavirus epidemic rose to 1,483 on Friday but the number of new infections in hard-hit Hubei province fell after a change in case definitions caused a massive increase the previous day.
The central province's health commission reported 116 more deaths and 4,823 new cases, the majority involving "clinically diagnosed" patients.
The province, the epicentre of the outbreak, had 242 more deaths and over 14,800 new cases on Thursday.
More than 64,600 people have now been infected in the country.
Health officials in Hubei said they started to count clinically diagnosed cases to ensure that patients get treated as early as possible instead of having to wait for laboratory tests to confirm they have the COVID-19 disease.
But the change raised concerns that the crisis may be more serious than Chinese authorities have reported.
Japan's first coronavirus death
Japan confirmed its first coronavirus death on Thursday – a woman in her 80s living in Kanagawa prefecture near Tokyo – adding to two previous fatalities in Hong Kong and the Philippines.
Japan is one of the worst affected of more than two dozen countries and territories outside mainland China that have seen hundreds of infections from the flu-like sickness.
A cruise liner quarantined off a Japanese port has more than 200 people confirmed with the disease. Authorities have said they will allow some elderly people to disembark on Friday.
Passengers on another cruise ship that spent two weeks at sea after being turned away by five countries over coronavirus fears started disembarking in Cambodia on Friday.
The MS Westerdam, carrying 1,455 passengers and 802 crew, docked in the Cambodian port town of Sihanoukville on Thursday. It had anchored offshore early in the morning to allow Cambodian officials to board and collect samples from passengers with any signs of ill health or flu-like symptoms.
Trump praises Chinese response
The surge of new cases reported on Thursday dented hopes the epidemic might soon be reaching a peak and halted a global stocks rally.
However, the rise in China's reported cases reflected a decision by authorities there to reclassify a backlog of suspected cases by using patients' chest images, and is not necessarily the "tip of an iceberg" of a wider epidemic, a top World Health Organization official said on Thursday.
Mike Ryan, head of WHO's health emergencies programme, said more than 14,000 new cases reported in Hubei province on Thursday came after a change to include results from quicker computerised tomography (CT) scans that reveal lung infections, rather than relying just on laboratory tests to confirm cases.
"We've seen this spike in the number of cases reported in China, but this does not represent a significant change in the trajectory of the outbreak," Ryan told a briefing in Geneva.
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