A health worker tests a resident for Covid-19 in Xi 'an, Shaanxi Province, China, Dec. 29.
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China’s Covid-19 cases continue to rise as authorities battle Xi’an outbreak

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A health worker tests a resident for Covid-19 in Xi ‘an, Shaanxi Province, China, Dec. 29. (Cang Hai/Costfoto/Future Publishing/Getty Images)China […]