A supermarket worker in the southern Chinese city of Shenzhen and five others tested positive for Covid-19, forcing the closure of some stores as officials act to damp a resurgence of the virus.A 41-year-old woman who sells yogurt at a supermarket run by Alibaba Group Holding Ltd. in the tech boomtown was diagnosed with the illness after visiting a doctor on Wednesday, Shenzhen Municipal Health Commission said late Friday night. Five others who…
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