In a glitzy Shanghai shopping district, about 40 people who happened to be at a Uniqlo store were informed that they would be spending the night there. A suspected COVID-19 case had been traced to the shop.
Elsewhere in the same city, Anna Rudashko was told to return to an office building she had visited for a meeting the day before. She spent 58 hours there with more than 200 strangers, waiting for test results.
Across China, in Shaanxi province, Zhao Xiaoqing was on a second date, visiting a man at his parents¡¯ home, when local authorities locked down the neighborhood. She quarantined with them for nearly 30 days. (Fortunately, she said, ¡°I got along well with his family.¡±)

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