China sees rise in asymptomatic coronavirus cases, to tighten controls at land borders

Mainland China reported 39 new coronavirus cases as of Sunday, up from 30 a day earlier, and the number of asymptomatic cases also surged as the government vowed tighter controls at land borders. The National Health Commission said on Monday that 78 new asymptomatic cases had been identified as of the end of Sunday, compared with 47 the day before. Imported cases and asymptomatic patients, who show no symptoms but can still pass the virus on, have become China's chief concern after draconian containment measures succeeded in slashing the overall infection rate.

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