The highly transmissible Delta variant of the coronavirus has taken hold in Sydney with close to 4,000 infections since mid-June despite weeks of lockdown
The city of 11 million is "swiftly launching comprehensive nucleic acid testing of all residents", senior Wuhan official Li Tao said at a press conference on Tuesday
China on Sunday reported 75 new coronavirus cases with 53 local transmissions, with a cluster linked to an eastern airport now reported to have spread to over 20 cities and more than a dozen provinces.