The highly contagious Delta variant of the Covid-19 has raised major concerns in China over the last few days. The virus has been spreading to places that had been virus-free for months, including the original epicentre of Wuhan.
The authorities in Wuhan said they would test its entire population for the virus after the city reported 7 local cases on Monday.
The city of 11 million is "swiftly launching comprehensive testing of all residents", a senior Wuhan official said.
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New cases have been reported in Wuhan for the first time since China brought its original wave under control by locking down the city in 2020.