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Ping Liu, Zhoujun Ma, Yu Deng, Yongpu Li, Wei Xia, Yu Liu, Xiaolan Wu, Junhuan Mou, Quan Li, Jianghua Nie, Wenxiu Zhou, Xueqin Fu, Fei Yu, Yan Li, Yaling Zhang, Qin Xiang, Xiaobin Peng, Guangqun Jiang
(Department of Respiratory and Critical Care Medicine, The People’s Hospital of Changshou District, Chongqing, China (mainland))
Med Sci Monit 2020; 26:e927472
SARS-CoV-2 has caused a pandemic. Control measures differ among countries. It is necessary to assess the effectiveness of these control measures.
MATERIAL AND METHODS: We collected the data of COVID-19 patients and control measures between January 18, 2020 and September 18, 2020 from the Changshou District and analyzed the clinical characteristics, epidemiological data, and the adjustment of policies to assess the effectiveness of control measures. The control of COVID-19 was divided into 2 stages, with the lifting of lockdown in Hubei province (March 25, 2020) as a dividing line.
RESULTS: We identified 32 patients through different means in the first stage. All the imported patients entered this area before the lockdown. In 93.1% of patients, the last exposure occurred before the implementation of the stay-at-home order and centralized isolation. Tracing of high-risk people and RT-PCR screening identified 56.3% of cases. In the second stage, all the high-risk people were under centralized isolation. Nine asymptomatic patients were identified. City lockdown and stay-at-home orders were not issued again, and no second-generation patients were found.
CONCLUSIONS: We have provided a successful model to control the transmission of COVID-19 in a short period.
Keywords: asymptomatic infections, COVID-19, Epidemiology