China's Shanghai announces two new rounds of mass COVID testing

The city of Shanghai on Tuesday announced two new rounds of mass COVID-19 testing of most of its 25 million residents over a three-day period, citing the need to trace infections linked to an outbreak at a karaoke lounge. The city government said on its official WeChat account that all residents in nine of the city's 16 districts would be tested twice from Tuesday to Thursday. People in parts of three other districts would also have to undergo tests.