asymptomatic cases
COVID-19 most transmissible 2 days before, 3 days after symptoms appear: Study
Infected individuals were more likely to be asymptomatic if they contracted the virus from a primary case
China reports surge in symptomless COVID-19 infections
A total of 20 new confirmed and 161 new asymptomatic cases were reported in the mainland on October 25
China's Qingdao orders city-wide COVID-19 testing following new infections
Daily COVID-19 infections in mainland China has fallen drastically from peaks early this year, but the country remains on high alert
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