A new coronavirus outbreak in China has been described as a “significant event” by the World Health Organisation.
The origins of a new cluster of Covid-19 infections in Beijing are uncertain, WHO officials said on Monday.
Claims it might have been caused by imports or packaging of salmon have been described as a “hypothesis”.
The Chinese capital has recorded 36 new cases, amid fears of a second wave.
China’s Vice Premier Sun Chunlan has called on officials to take “decisive measures” to prevent it spreading further.
Local media reports earlier claimed the virus was discovered on chopping boards used for imported salmon at the city’s Xinfadi market.
It was afterwards placed on lockdown and restrictions were imposed on 11 other nearby neighbourhoods.
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