Chinese Center for Disease Control and Prevention, Beijing, China.
JAMA. 2021 Feb 2;325(5):489-492. doi: 10.1001/jama.2020.23942.
This population epidemiology study characterizes trends in the prevalence of asymptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among international entrants testing positive for SARS-CoV-2 at Chinese border checkpoints between mid-April and mid-October 2020.
本人群流行病学研究描述了 2020 年 4 月中旬至 10 月中旬期间,在中国边境检查站检测出 SARS-CoV-2 呈阳性的国际入境者中无症状严重急性呼吸综合征冠状病毒 2(SARS-CoV-2)感染的流行趋势。