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Next China: Testing Covid Zero

Health workers administer Covid-19 test outside a building placed under lockdown in Hong Kong, China, on Thursday, Jan. 6, 2022. 

Health workers administer Covid-19 test outside a building placed under lockdown in Hong Kong, China, on Thursday, Jan. 6, 2022. 

Photographer: Louise Delmotte/Bloomberg

It’s been a trying week for those clinging to the idea that Covid-19 can be stamped out. 

Take Hong Kong, which had kept the virus away from its general population for months through its notorious quarantine requirements. After successfully avoiding a single Delta variant outbreak, the city has now seen Omicron break through its defenses.