After six new cases were reported in this past month, the Chinese city of Wuhan will begin what it is calling "10 days of mass battle" to test all 11 million residents after the discovery of a new cluster of coronavirus cases, NPR's Emily Feng reported. Each of the city's districts will be required to create a testing plan by Tuesday, according Reuters, which first reported the initiative.

Wuhan, where the world's first coronavirus cases were reported in late December, eased many restrictions in early April after a strict lockdown. Now the city will test all of its residents over a 10-day period.

All six new cases came from the same residential compound, and an 89-year-old man was infected. Five of them never had symptoms, Feng reported. The city has been trying to find asymptomatic carriers through a random testing initiative, which it started in April.

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