China's city of Wuhan, the original epicentre of the new coronavirus outbreak, conducted 467,847 nucleic acid tests on May 18, the local health authority said, up from the 335,887 tests a day earlier, SIA reports.
Wuhan kicked off a campaign on May 14 to look for asymptomatic carriers - infected people who show no outward sign of illness - after confirming on May 9-10 its first cluster of Covid-19 infections since its release from a virtual lockdown in early April.
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